Furniture › Bedroom Furniture › Mattresses & Boxsprings › king split boxspring

Firm 17" Mattress - Stearns & Foster Pillow Top Box Spring | 83 H x 72 W 17 D in Wayfair 43019932

The Stearns & Foster Reserve Collection is our highest expression of quality and the most comfortable mattress we’ve ever made—meticulously designed with our finest materials to deliver one-of-a-kind comfort. Mattress Size: Split California King | Firm... more

Priage by Zinus 7.5-inch BiFold Foundation

The BiFold Split king size box spring by Priage features a folding mattress foundation that can compresses for added ease. It is constructed with heavy gauge steel and has a fabric cover. It is 7.5 inches deep. more

King Medium 13" Hybrid Mattress - Spinal Solution 9-Inch Tight Top Nylon Vinyl & Split Wood Box Spring, Blue | 80 H x 76 W 13 D in Wayfair

Basically, if adults are sleeping on your mattresses, you probably want to have nylon. Its breathability allows your guests to sleep cooler, so you don't have to worry that they'll wake up in the middle of the night dripping with sweat as they throw... more

BULYAXIA King Box Spring 9 Inch Metal Box Spring King Size King Box Spring Low Profile Box Spring King with Cover Heavy Duty Mattress Foundation/Bed Base Easy Assembly Non-Slip No Noise

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Deluxe King Mattress and Box Spring Bag Set – Moving and Storage Protection Cover – 2.25 Mil – Includes 1 Mattress Bag 2 Box Spring Bags

Mattress bags keep your mattress and box springs clean during moving or storing while protecting against soil dust and water damage. Save expense of costly mattress replacement. Designed to fit mattress up to 14 thick. Made of 2.25 mil heavy grade... more

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

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

Mattress Foundation - High Profile, King Split - Ballard Designs 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

White Noise Yukon Wood Box Spring whiteWood | 5 H x 36 W x 84 D in | Wayfair 39A06A1DB8804C4F968A14920817FC41

This product was constructed of sturdy spruce wood and engineered to be assembled in your room or area of choice. It was covered in the fabric of your choice and style! Size: Split California King, Profile (Box Spring Height): Low Profile (5") | White... more

King Firm 20" Hybrid Mattress - The Twillery Co.® Kurtz 12-Inch Medium EuroTop Single Sided w/ Split Box Spring | 80 H x 76 W 20 D in Wayfair

Enjoy the sweetest dreams possible with this box spring ultra plush memory foam mattress with its Euro top, which is firmer around the edges and softer in the center. With its independent springs that minimize motion transfer and provide body pressure... more

White Noise Yukon Wood Box Spring whiteWood | Split California King | Wayfair 31B15FFCD5164DDCB5576052A5D8C426

This product was constructed of sturdy spruce wood and engineered to be assembled in your room or area of choice. It was covered in the fabric of your choice and style! Size: Split California King, Profile (Box Spring Height): Standard Profile (8”) |... more

King Medium 9" Hybrid Mattress - Spinal Solution & Split Wood Box Spring Set Comfortable Water Proof Vinyl Mattresses | 80 H x 76 W 14 D in Wayfair

It's time to change your sleeping mattress and get our premium bedding mattresses to help you sleep properly and without any problem! This water-proof hybrid mattress is capable of providing you with the ultimate comfort and relaxation. The 9" Medium... more

King Firm 16" Hybrid Mattress - The Twillery Co.® Kurtz 12-Inch Medium EuroTop Single Sided w/ Split Box Spring | 80 H x 76 W 16 D in Wayfair

Enjoy the sweetest dreams possible with this box spring ultra plush memory foam mattress with its Euro top, which is firmer around the edges and softer in the center. With its independent springs that minimize motion transfer and provide body pressure... more

King Firm 9" Memory Foam Mattress - Spinal Solution Landin foam Medium Pillowtop Hybrid w/Split Box Spring, White | 80 H x 76 W 17 D in Wayfair

This mattress has springs with independent springs that minimize motion transfer and provide body pressure relief, Pocket mattresses are a great option for almost anyone. Even lovers of memory foam or other foam mattresses can benefit from Pocket... more

King Medium 17" Foam Mattress - The Twillery Co.® 9-Inch Vinyl Tight Top Pocket Coil Rolled & Split Wood Box Spring Set | 80 H x 76 W 17 D in Wayfair

Enjoy the sweetest dreams possible with this box spring ultra plush memory foam mattress with its Euro top, which is firmer around the edges and softer in the center. With its independent springs that minimize motion transfer and provide body pressure... more

King Firm 9" Memory Foam Mattress - Spinal Solution Landin foam Medium Pillowtop Hybrid w/Split Box Spring, White | 80 H x 76 W 13 D in Wayfair

This mattress has springs with independent springs that minimize motion transfer and provide body pressure relief, Pocket mattresses are a great option for almost anyone. Even lovers of memory foam or other foam mattresses can benefit from Pocket... more

King Medium 13" Foam Mattress - Spinal Solution 9-Inch Vinyl Tight Top Pocket Coil Rolled & Split Wood Box Spring Set | 80 H x 76 W 13 D in Wayfair

This mattress has springs with independent springs that minimize motion transfer and provide body pressure relief, Pocket mattresses are a great option for almost anyone. Even lovers of memory foam or other foam mattresses can benefit from Pocket... more

King Medium 13" Foam Mattress - The Twillery Co.® 9-Inch Vinyl Tight Top Pocket Coil Rolled & Split Wood Box Spring Set | 80 H x 76 W 13 D in Wayfair

Enjoy the sweetest dreams possible with this box spring ultra plush memory foam mattress with its Euro top, which is firmer around the edges and softer in the center. With its independent springs that minimize motion transfer and provide body pressure... more

California King Medium 10" Innerspring Mattress - White Noise Tight Top Sofa Bed Box Sprin, Wood | King, Split Low Profile (4") Wayfair

We are a proud manufacturer of the finest quality mattresses & box springs, with the highest standards in durability, quality, comfort, & beauty. All of our products are made to ensure that you get only the best! This item is part of our 225 comfort... more

King Firm 20" Foam Mattress - Alwyn Home Alibi 12-Inch Medium Cooling EuroTop Pocket Coil Bed In A Box w/ Split Spring | 80 H x 76 W 20 D in Wayfair

This mattress has springs with independent springs that minimize motion transfer and provide body pressure relief, Pocket mattresses are a great option for almost anyone. Even lovers of memory foam or other foam mattresses can benefit from Pocket... more

King Firm 16" Foam Mattress - Alwyn Home Alibi 12-Inch Medium Cooling EuroTop Pocket Coil Bed In A Box w/ Split Spring | 80 H x 76 W 16 D in Wayfair

This mattress has springs with independent springs that minimize motion transfer and provide body pressure relief, Pocket mattresses are a great option for almost anyone. Even lovers of memory foam or other foam mattresses can benefit from Pocket... more

Firm 16" Mattress - Stearns & Foster Pillow Top Box Spring | 83 H x 72 W 16 D in Wayfair 43019432

The Stearns & Foster Lux Estate Collection provides an elevated level of comfort and support, with the added benefit of features to help keep you cool, all night long. Mattress Size: Split California King | Firm 16" Mattress - Stearns & Foster Pillow... more

Medium 16" Mattress - Stearns & Foster Pillow Top Box Spring | 83 H x 72 W 16 D in Wayfair 43019332

The Stearns & Foster Lux Estate Collection provides an elevated level of comfort and support, with the added benefit of features to help keep you cool all night long. Mattress Size: Split California King | Medium 16" Mattress - Stearns & Foster Pillow... more

Medium 14.5" Mattress - Stearns & Foster Tight Top Box Spring | 83 H x 72 W 14.5 D in Wayfair 43009032

The Stearns & Foster Lux Estate Collection provides an elevated level of comfort and support, with the added benefit of features to help keep you cool, all night long. Mattress Size: Split California King | Medium 14.5" Mattress - Stearns & Foster... more

16" Mattress - Stearns & Foster Plush Pillow Top Box Spring | 83 H x 72 W 16 D in Wayfair 43008432

The Stearns & Foster Lux Estate Collection provides an elevated level of comfort and support, with the added benefit of features to help keep you cool, all night long. Mattress Size: Split California King | 16" Mattress - Stearns & Foster Plush Pillow... more

Medium 16" Mattress - Stearns & Foster Tight Top Box Spring | 83 H x 72 W 16 D in Wayfair 43008132

The Stearns & Foster Reserve Collection is our highest expression of quality and the most comfortable mattress we’ve ever made—meticulously designed with our finest materials to deliver one-of-a-kind comfort. Mattress Size: Split California King |... more

Extra Firm 14.5" Mattress - Stearns & Foster 14." Tight Top Box Spring | 83 H x 72 W 14.5 D in Wayfair 43007732

The Stearns & Foster Lux Estate Collection provides an elevated level of comfort and support, with the added benefit of features to help keep you cool, all night long. Mattress Size: Split California King | Extra Firm 14.5" Mattress - Stearns & Foster... more

17" Mattress - Stearns & Foster Plush Pillow Top Box Spring | 83 H x 72 W 17 D in Wayfair 43010032

The Stearns & Foster Reserve Collection is our highest expression of quality and the most comfortable mattress we’ve ever made—meticulously designed with our finest materials to deliver one-of-a-kind comfort. Mattress Size: Split California King | 17"... more

Medium 14" Foam Mattress - Stearns & Foster Tight Top Box Spring | 83 H x 72 W 14 D in Wayfair 43001332

The Stearns & Foster Studio Collection features quality you can see and feel with high-quality materials like supportive innersprings, silky-soft covers and comfortable, plush memory foam. Mattress Size: Split California King | Medium 14" Foam Mattress... more

Deluxe King Mattress and Box Spring Bag Set – Moving and Storage Protection Cover – 2.25 Mil – Includes 1 Mattress Bag 2 Box Spring Bags

Mattress bags keep your mattress and box springs clean during moving or storing while protecting against soil dust and water damage. Save expense of costly mattress replacement. Designed to fit mattress up to 14 thick. Made of 2.25 mil heavy grade... more

Deluxe King Mattress and Box Spring Bag Set – Moving and Storage Protection Cover – 2.25 Mil – Includes 1 Mattress Bag 2 Box Spring Bags

Mattress bags keep your mattress and box springs clean during moving or storing while protecting against soil dust and water damage. Save expense of costly mattress replacement. Designed to fit mattress up to 14 thick. Made of 2.25 mil heavy grade... more

Deluxe King Mattress and Box Spring Bag Set – Moving and Storage Protection Cover – 2.25 Mil – Includes 1 Mattress Bag 2 Box Spring Bags

Mattress bags keep your mattress and box springs clean during moving or storing while protecting against soil dust and water damage. Save expense of costly mattress replacement. Designed to fit mattress up to 14 thick. Made of 2.25 mil heavy grade... more

Extra Wide Bed Bridge Twin to King Converter Kit – Use to Easily Combine 2 Twins to King or Plug Gap Between Split King Adjustable Mattresses，Metal buckle

Used As A Mattress Connector A Slot For Mattress Stuffing. It Is Placed In The Crevice. Description: Help and comfort: Bed padding prevents sliding into the mattress between guests. Sleeping on a comfortable foam bed is better than sleeping on a hard... more

Innomax Upperflex Freedom Air Digital Air Bed (Split Head King Omni-Air 10 )

Freedom-Air: Freedom-Air by InnoMax is a powerful compact & integrated in-rail air inflator with an easy plug-n-go set-up. This air inflator was designed to be compact & lightweight so it can be housed in the specially designed Power Edgeâ„¢ foot rail... more

Innomax Upperflex Freedom Air Digital Air Bed (Split Head King Medallion 14 )

Freedom-Air: Freedom-Air by InnoMax is a powerful compact & integrated in-rail air inflator with an easy plug-n-go set-up. This air inflator was designed to be compact & lightweight so it can be housed in the specially designed Power Edgeâ„¢ foot rail... more

Innomax Upperflex Freedom Air Digital Air Bed (Split Head King Harmony 10 )

Freedom-Air: Freedom-Air by InnoMax is a powerful compact & integrated in-rail air inflator with an easy plug-n-go set-up. This air inflator was designed to be compact & lightweight so it can be housed in the specially designed Power Edgeâ„¢ foot rail... more

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

Mattress Foundation - Slim Profile, King Split - Ballard Designs 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