10 Best Split King Adjustable Mattresses in 2026

Purple’s 2-inch GelFlex Grid cradles pressure points at the hips and shoulders while keeping the spine aligned, a design that earned high marks for support in a 2025 study. This polymer grid creates a distinct, bouncy feel that doesn’t sink, and its open channels draw heat away from the body. The result is a medium-firm mattress rated as ideal for back, stomach, side, and combination sleepers.

The mattress measures 9.2 inches high and weighs 100 pounds, making it lighter and lower-profile than many split king bundles. For example, the Sven & Son bundle includes a 14-inch hybrid mattress and a smart base, resulting in a total weight of 368 pounds. The Purple focuses on delivering its specific pressure relief and cooling technology without an integrated adjustable base.

A 25-year warranty on an adjustable base signals a manufacturer betting on long-term durability, a rare commitment in this category. This bundle is for someone who wants the full suite of relaxation features, massage modes, zero gravity positioning, and ambient under-bed lighting, without piecing components together. The included 14-inch hybrid spring mattress with bionic cooling gel infused memory foam aims to complete the package for those prioritizing convenience and a unified aesthetic.

The trade-off is a substantial 368-pound total system, which means you’ll want help on delivery day. Its medium-soft mattress feel is fixed, unlike the Purple Split King GelFlex Grid Mattress, which uses a GelFlex Grid. Choose this Sven & Son bundle if you value integrated features and a single warranty over the ability to mix and match a base with any third-party mattress.

This adjustable bed’s head and foot massage offers three intensity levels and four modes, which allows for customizable relaxation at the end of the day. The wireless remote includes one-touch Zero Gravity and Anti-Snore presets for quick positioning. A cooling graphene-infused cover and gel memory foam layers are designed to address heat retention while providing medium-firm support.

The bed frame and mattress ship in separate packages, which may arrive at different times. Its adjustable base supports up to 750 pounds and features interchangeable legs for four height options from 8 to 13 inches, allowing it to fit various bed frames. Setup requires no tools, and a retainer bar helps keep the mattress secure during adjustments.

The Celestial Sleep bundle combines a 60-degree head incline with a 12-inch gel memory foam mattress, a pairing designed to improve airways and spine alignment. This setup suits someone prioritizing core adjustable bed functions, like Zero Gravity presets and a mattress that conforms to the body, over premium extras. It provides the essential mechanics for raising your head and feet.

The trade-off is a single mattress firmness and a frame focused on fundamentals. You get reliable articulation and cooling gel foam, but you won’t find the massage features or under-bed lighting of a bundle like the Sven & Son. It’s a straightforward choice for cooling memory foam comfort, leaving advanced features for other models.

A 12-inch profile of plush memory foam creates a deeply cushioning surface that contours closely, which is the core appeal for sleepers who want to sink in rather than perch on top. It suits those prioritizing pressure relief and a traditional, body-hugging memory foam sensation. The split panels are designed for adjustable bases, and the straightforward, certified materials are a practical plus for anyone wary of fiberglass or off-gassing.

The Bold City Accents mattress is a 12-inch profile with plush cushioning, which provides a deeper-contouring feel without losing underlying support. Its CertiPUR-US certified memory foam is designed to absorb motion, so a partner’s movement is less likely to be felt. This fiberglass-free mattress is also made in the USA and carries an OEKO-TEX Standard 100 certification for its cover.

A 1,044-coil zoned support system lifts your lower back and stabilizes the edges, which matters if you sleep on your side and need pressure relief for your hips and shoulders. The GlacierTex MAX cooling cover and breathable foam stack are built for hot sleepers who want to stop overheating, while the plush, contouring layers let your body sink in without misalignment.

That substantial coil count and foam stack do add weight, so moving this 130-pound mattress takes more effort than a simpler model like the Purple Split King GelFlex Grid. Choose this for its targeted, cooling support in a split king; consider a lighter, simpler mattress if you plan to adjust your bed frame height or position frequently.

A triple layer of cooling gel memory foam sits at the core of this design, which is the concrete reason it stands out for temperature regulation. It’s built for couples or restless sleepers who need the bed to stay cool and isolate motion, thanks to those individually wrapped coils. The fiber-free, certified materials are a clear plus for anyone who wants to avoid off-gassing or chemical concerns, making the 100-night trial a genuinely low-risk way to check the medium feel.

This mattress arrives compressed in a box, which requires space and patience for its 48-72 hour expansion period. Its 114-pound packaged weight means you’ll need help moving it into place. That process is a trade-off for the convenience of direct shipping and a reduced carbon footprint during transit.

A five-minute installation makes this bundle stand out for anyone who dreads furniture assembly. You get a complete sleep system, adjustable base and a 14-inch hybrid mattress, with smart controls for zero gravity and anti-snore presets right out of the box. It suits sleepers who want immediate, fuss-free customization for reading or pain relief without spending an afternoon with an Allen key.

This split king bundle includes a medium-soft hybrid mattress, so buyers cannot select a different firmness. Its 10-year warranty on the frame and motors suggests long-term durability, but the comfort level is fixed as part of the package.

An 8-inch profile built around a 2-inch GelFlex Grid delivers a distinctly firm, non-sinking feel, a design focused on keeping the spine aligned without pressure at the hips and shoulders. This makes it a straightforward choice for back and stomach sleepers who prioritize stable support over plush cushioning. The grid’s open structure and breathable design aim to move heat away, addressing a common complaint with firmer foam beds.

The PurpleFlex Split King Firm Mattress provides a firm feel built for spine alignment and less lower-back strain, which makes it ideal for back and stomach sleepers who want stable, supportive rest. Its 8-inch height is lower than many split king options, such as the 14-inch SlumberCool MAX Hybrid, resulting in a thinner profile. The design uses 2 inches of the brand’s GelFlex Grid for pressure relief, a system that adapts as you move differently than memory foam.

A medium to medium-firm gel memory foam construction contours without sinking, providing stable support for posture alignment and a classic pressure-relieving feel. This design also delivers effective motion isolation, so a partner’s movement is less likely to disturb the other side of the bed.

Built entirely from foam layers, including a resilient base, this mattress offers a more traditional contouring feel compared to grid-based designs like the Purple or hybrid models with springs. The reinforced edge structure is engineered to resist sagging and collapse, which helps maintain a usable sitting surface at the perimeter.