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    Cocobase Mattress Foundation - California King Size

    Cocobase Mattress Foundation - California King Size

    The CoCoBase Mattress Base is made with a 5 inch durable coconut fiber coconut coir. This new material created by untwisting coconut husks is infused with natural latex. The Spring like qualities of Coconut Coir can be built to utilize the natural... more

    $981.91

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    Mattress Foundation - Low Profile, California King Split - Ballard Designs

    Mattress Foundation - Low Profile, California King Split - Ballard Designs

    Take your nighttime comfort to the next dreamy level with our luxurious and supportive Mattress Foundations. Box edge frames are hand built by Amish craftsmen from solid spruce wood in three profiles, Slim, Low and High, to custom fit your bed and... more

    $1,138.00

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    Best Seller
    Mattress Foundation - Slim Profile, California King Split - Ballard Designs

    Mattress Foundation - Slim Profile, California King Split - Ballard Designs

    Take your nighttime comfort to the next dreamy level with our luxurious and supportive Mattress Foundations. Box edge frames are hand built by Amish craftsmen from solid spruce wood in three profiles, Slim, Low and High, to custom fit your bed and... more

    $1,078.00

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    Mattress Foundation - High Profile, California King Split - Ballard Designs

    Mattress Foundation - High Profile, California King Split - Ballard Designs

    Take your nighttime comfort to the next dreamy level with our luxurious and supportive Mattress Foundations. Box edge frames are hand built by Amish craftsmen from solid spruce wood in three profiles, Slim, Low and High, to custom fit your bed and... more

    $1,178.00

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    California King Medium 10" Gel/Foam Mattress - Signature Design By Ashley Gel Memory Foam & Adjustable Base | 83.46 H x 72.05 W 10 D in Wayfair

    California King Medium 10" Gel/Foam Mattress - Signature Design By Ashley Gel Memory Foam & Adjustable Base | 83.46 H x 72.05 W 10 D in Wayfair

    Enjoy endless possibilities for restful sleep with this hybrid king innerspring mattress and adjustable base set. You get the best of both worlds: the pressure relief of cooling gel-infused memory foam, coupled with body-contouring pocketed coils for... more

    $2,467.88 $1,800.00

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    Gaia Mattress Foundation, Cal King

    Gaia Mattress Foundation, Cal King

    || Fremont & Park - Gaia Collection || Providing support to your California King mattress is the Gaia mattress foundation. The black metal framing of the support system features a white and gray two-tone cover. more

    $211.99 $183.99

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    California King Medium 10.5" Hybrid Mattress - Wayfair Sleep™ Sleep | 83 H x 71 W 10.5 D in 7C90D11A08CF4D47A2D045C5AFB57515

    California King Medium 10.5" Hybrid Mattress - Wayfair Sleep™ Sleep | 83 H x 71 W 10.5 D in 7C90D11A08CF4D47A2D045C5AFB57515

    Get the zzz's you need with this hybrid mattress. It features five layers including 10.5" of memory foam, high-density base foam, wrapped innerspring, plush poly foam, and a memory foam pillow top that helps relieve pressure and adds a little extra... more

    $753.93 $439.99

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    California King 14" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair

    California King 14" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair

    Love a plush, pillowy feel, but need a higher level of support? Look no further than this plush mattress and adjustable base set. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory foam for temperature... more

    $2,988.63 $1,940.00

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    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    Get back to restful nights and refreshed mornings with this king firm mattress and adjustable base set. It's ideal for back and stomach sleepers who prefer a mattress that doesn't “give” too much, yet still pampers with cradling comfort. Five different... more

    $3,214.05 $2,100.00

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    California King Firm 12" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG009987

    California King Firm 12" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG009987

    With the Hybrid 1200 California mattress and adjustable base set, you have endless possibilities for restful sleep. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam provides the... more

    $3,342.87 $2,100.00

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    California King 12" Gel/Foam Mattress - Signature Design by Ashley Ultra Plush Gel Memory Foam & Adjustable Base | 83.46 H x 71 W 12 D in Wayfair

    California King 12" Gel/Foam Mattress - Signature Design by Ashley Ultra Plush Gel Memory Foam & Adjustable Base | 83.46 H x 71 W 12 D in Wayfair

    Enjoy endless possibilities for restful sleep with this hybrid innerspring California king mattress and adjustable base set. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam... more

    $3,180.20 $2,140.00

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    California King Firm 12" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG009986

    California King Firm 12" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG009986

    With the Hybrid 1200 mattress and adjustable base set, you have endless possibilities for restful sleep. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam provides the firmness... more

    $3,117.45 $2,000.00

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    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    Get back to restful nights and refreshed mornings with this king firm mattress and adjustable base set. It's ideal for back and stomach sleepers who prefer a mattress that doesn't “give” too much, yet still pampers with cradling comfort. Five different... more

    $3,214.05 $2,100.00

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    California King 16" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair

    California King 16" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair

    For those longing for just the right balance of plushness and support, this Euro top mattress and adjustable base set is a top choice. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory foam for... more

    $3,194.76 $2,100.00

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    California King 14" Gel/Foam Mattress - Signature Design by Ashley Chime Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair

    California King 14" Gel/Foam Mattress - Signature Design by Ashley Chime Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair

    With the Hybrid 1400 mattress, you have endless possibilities for restful sleep. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam provides the firmness you love. Gel memory foam... more

    $3,465.27 $2,170.00

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    California King 16" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair PKG009951

    California King 16" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair PKG009951

    For those longing for just the right balance of plushness and support, this California king Euro top mattress and adjustable base set is a top choice. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory... more

    $3,420.18 $2,160.00

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    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009979

    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009979

    Luxury comfort leads to luxury rest. This pillow top mattress soothes your body with cottony softness on the mattress cover. Packed inside are layers of support foam and gel memory foam to relieve your pressure points. Rows of power packed wrapped... more

    $3,864.63 $2,400.00

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    California King Firm 12" Memory Foam Mattress - Signature Design by Ashley Ultra Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010131

    California King Firm 12" Memory Foam Mattress - Signature Design by Ashley Ultra Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010131

    When it comes to your comfort, discover this California king mattress and adjustable base set. The mattress's thick layer of memory foam contours to your body, delivering amazing support, pressure relief and comfort. Its memory foam layer is supported... more

    $2,515.88 $1,700.00

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    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009979

    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009979

    Luxury comfort leads to luxury rest. This pillow top mattress soothes your body with cottony softness on the mattress cover. Packed inside are layers of support foam and gel memory foam to relieve your pressure points. Rows of power packed wrapped... more

    $3,864.63 $2,400.00

    FREE shipping

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    California King 12" Gel/Foam Mattress - Signature Design by Ashley Ultra Plush Gel Memory Foam & Adjustable Base | 83.46 H x 71 W 12 D in Wayfair

    California King 12" Gel/Foam Mattress - Signature Design by Ashley Ultra Plush Gel Memory Foam & Adjustable Base | 83.46 H x 71 W 12 D in Wayfair

    Enjoy endless possibilities for restful sleep with this hybrid innerspring California king mattress and adjustable base set. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam... more

    $3,180.20 $2,140.00

    FREE shipping

    go to store
    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    Get back to restful nights and refreshed mornings with this firm mattress and adjustable base set. It's ideal for back and stomach sleepers who prefer a mattress that doesn't “give” too much, yet still pampers with cradling comfort. Five different... more

    $3,890.37 $2,200.00

    FREE shipping

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    California King Firm 12" Memory Foam Mattress - Signature Design by Ashley Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010047

    California King Firm 12" Memory Foam Mattress - Signature Design by Ashley Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010047

    Memory foam mattresses are a hot trend for good reason. But for some, they simply get a bit too toasty for comfort. Rest easy. This 12-inch memory foam mattress and adjustable base set has you covered with the cradling feel you love and temperature... more

    $3,294.57 $2,050.00

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    California King 14" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair

    California King 14" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair

    Love a plush, pillowy feel, but need a higher level of support? Look no further than this plush mattress and adjustable base set. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory foam for temperature... more

    $2,988.63 $1,940.00

    FREE shipping

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    California King Firm 12" Memory Foam Mattress - Signature Design By Ashley Ultra Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010130

    California King Firm 12" Memory Foam Mattress - Signature Design By Ashley Ultra Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010130

    When it comes to your comfort, discover this California king mattress and adjustable base set. The mattress's thick layer of memory foam contours to your body, delivering amazing support, pressure relief and comfort. Its memory foam layer is supported... more

    $2,290.46 $1,370.00

    FREE shipping

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    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    California King Firm 13.5" Gel/Foam Mattress - Signature Design by Ashley Gel Memory Foam & Adjustable Base | 83 H x 71 W 13.5 D in Wayfair

    Get back to restful nights and refreshed mornings with this firm mattress and adjustable base set. It's ideal for back and stomach sleepers who prefer a mattress that doesn't “give” too much, yet still pampers with cradling comfort. Five different... more

    $3,890.37 $2,200.00

    FREE shipping

    go to store
    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009978

    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009978

    Luxury comfort leads to luxury rest. This pillow top mattress and adjustable base set soothes your body with cottony softness on the mattress cover. Packed inside are layers of support foam and gel memory foam to relieve your pressure points. Rows of... more

    $3,188.31 $1,930.00

    FREE shipping

    go to store
    California King Medium 10" Gel/Foam Mattress - Signature Design by Ashley Chime Gel Memory Foam & Adjustable Base | 83.46 H x 72.05 W 10 D in Wayfair

    California King Medium 10" Gel/Foam Mattress - Signature Design by Ashley Chime Gel Memory Foam & Adjustable Base | 83.46 H x 72.05 W 10 D in Wayfair

    Enjoy endless possibilities for restful sleep with this hybrid innerspring mattress and adjustable base set. You get the best of both worlds: the pressure relief of cooling gel-infused memory foam, coupled with body-contouring pocketed coils for... more

    $2,242.46 $1,600.00

    FREE shipping

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    King Firm 12" Memory Foam Mattress - Signature Design by Ashley Ultra Plush & Adjustable Base | 79 H x 75 W 12 D in Wayfair PKG010128

    King Firm 12" Memory Foam Mattress - Signature Design by Ashley Ultra Plush & Adjustable Base | 79 H x 75 W 12 D in Wayfair PKG010128

    When it comes to your comfort, discover this California king mattress and adjustable base set. The mattress's thick layer of memory foam contours to your body, delivering amazing support, pressure relief and comfort. Its memory foam layer is supported... more

    $2,515.88 $1,800.00

    FREE shipping

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    King Firm 12" Memory Foam Mattress - Signature Design By Ashley Ultra Plush & Adjustable Base | 79 H x 75 W 12 D in Wayfair PKG010127

    King Firm 12" Memory Foam Mattress - Signature Design By Ashley Ultra Plush & Adjustable Base | 79 H x 75 W 12 D in Wayfair PKG010127

    When it comes to your comfort, discover this California king mattress and adjustable base set. The mattress's thick layer of memory foam contours to your body, delivering amazing support, pressure relief and comfort. Its memory foam layer is supported... more

    $2,290.46 $1,650.00

    FREE shipping

    go to store
    California King 16" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair

    California King 16" Gel/Foam Mattress - Signature Design by Ashley Mt Dana Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair

    For those longing for just the right balance of plushness and support, this Euro top mattress and adjustable base set is a top choice. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory foam for... more

    $3,194.76 $2,100.00

    FREE shipping

    go to store
    California King 14" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair PKG009942

    California King 14" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair PKG009942

    Love a plush, pillowy feel, but need a higher level of support? Look no further than this California king plush mattress and adjustable base set. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory foam... more

    $3,214.05 $1,840.00

    FREE shipping

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    California King Medium 10" Gel/Foam Mattress - Signature Design by Ashley Chime Gel Memory Foam & Adjustable Base | 83.46 H x 72.05 W 10 D in Wayfair

    California King Medium 10" Gel/Foam Mattress - Signature Design by Ashley Chime Gel Memory Foam & Adjustable Base | 83.46 H x 72.05 W 10 D in Wayfair

    Enjoy endless possibilities for restful sleep with this hybrid innerspring mattress and adjustable base set. You get the best of both worlds: the pressure relief of cooling gel-infused memory foam, coupled with body-contouring pocketed coils for... more

    $2,242.46 $1,600.00

    FREE shipping

    go to store
    California King 14" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair PKG009942

    California King 14" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair PKG009942

    Love a plush, pillowy feel, but need a higher level of support? Look no further than this California king plush mattress and adjustable base set. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory foam... more

    $3,214.05 $1,840.00

    FREE shipping

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    California King Firm 10" Memory Foam Mattress - Signature Design by Ashley & Adjustable Base | 83.5 H x 71 W 10 D in Wayfair PKG010081

    California King Firm 10" Memory Foam Mattress - Signature Design by Ashley & Adjustable Base | 83.5 H x 71 W 10 D in Wayfair PKG010081

    Enjoy endless possibilities for restful sleep with this king memory foam mattress and adjustable base set. Soothing memory foam contours to your body, while a thick layer of firm support foam provides plentiful support and pressure relief of your... more

    $3,216.20 $2,180.00

    FREE shipping

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    California King Firm 12" Memory Foam Mattress - Signature Design By Ashley Ultra Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010130

    California King Firm 12" Memory Foam Mattress - Signature Design By Ashley Ultra Plush & Adjustable Base | 83 H x 71 W 12 D in Wayfair PKG010130

    When it comes to your comfort, discover this California king mattress and adjustable base set. The mattress's thick layer of memory foam contours to your body, delivering amazing support, pressure relief and comfort. Its memory foam layer is supported... more

    $2,290.46 $1,370.00

    FREE shipping

    go to store
    California King 16" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair PKG009951

    California King 16" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 16 D in Wayfair PKG009951

    For those longing for just the right balance of plushness and support, this California king Euro top mattress and adjustable base set is a top choice. Five different levels of high-density foam, including plush pressure-relieving foam and gel memory... more

    $3,420.18 $2,160.00

    FREE shipping

    go to store
    California King 14" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair PKG009996

    California King 14" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 14 D in Wayfair PKG009996

    With the Hybrid 1400 mattress, you have endless possibilities for restful sleep. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam provides the firmness you love. Gel memory foam... more

    $3,690.69 $2,300.00

    FREE shipping

    go to store
    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009978

    California King 13" Gel/Foam Mattress - Signature Design by Ashley Plush Gel Memory Foam & Adjustable Base | 83 H x 71 W 13 D in Wayfair PKG009978

    Luxury comfort leads to luxury rest. This pillow top mattress and adjustable base set soothes your body with cottony softness on the mattress cover. Packed inside are layers of support foam and gel memory foam to relieve your pressure points. Rows of... more

    $3,188.31 $1,930.00

    FREE shipping

    go to store
    California King Firm 10" Memory Foam Mattress - Signature Design by Ashley & Adjustable Base | 83.5 H x 71 W 10 D in Wayfair PKG010080

    California King Firm 10" Memory Foam Mattress - Signature Design by Ashley & Adjustable Base | 83.5 H x 71 W 10 D in Wayfair PKG010080

    Enjoy endless possibilities for restful sleep with this memory foam mattress and adjustable base set. Soothing memory foam contours to your body, while a thick layer of firm support foam provides plentiful support and pressure relief of your body’s... more

    $2,539.88 $1,580.00

    FREE shipping

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    California King Medium 10" Innerspring Mattress - Alwyn Home Ambrose Tight Top | 10 D in Wayfair FA359736963D4DF5B7A42058E24C5CC3

    California King Medium 10" Innerspring Mattress - Alwyn Home Ambrose Tight Top | 10 D in Wayfair FA359736963D4DF5B7A42058E24C5CC3

    If even and perfectly cushioned support strikes your fancy, then the Foam and Spring Mattress is your ticket to many well-rested mornings to come. This innerspring design is crafted to be as comfortable as it is supportive. It’s founded with a base... more

    $559.99

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    More information about Mattresses & Boxsprings

    Best prices on Adjustable base mattress foundation king, California King in Mattresses & Boxsprings online. Visit Bizrate to find the best deals on top brands. Read reviews on Home & Garden merchants and buy with confidence.