iSleep Mattress Reviews

An adjustable air-hybrid behaves differently than foam or a traditional spring bed. The iSleep felt stable under me, but the comfort shifted in noticeable steps as we moved the firmness up or down—especially in the first week. Once I dialed in a middle-to-firmer setting, my lower back stopped “tracking” every small tweak and the surface felt consistent night to night.

Marcus (our heavier tester) lived in the firmer range and cared most about whether his hips stayed level. On the firmer settings, he didn’t feel that slow sink you sometimes get on thick foams. Mia came at it from the other end: she lowered the setting until her shoulder could settle in, then nudged it up until her hips stopped drifting. Both agreed the latex-plus-coil feel rebounds quickly when you change positions.

For couples, the configuration matters as much as the material. The split-head option let Jenna and Ethan fine-tune the head feel without fully separating the bed, while the full split king kept motion transfer between partners close to zero. The tradeoff is bedding: split-head sheets are simpler than split-king bedding, but both take a little planning.

We tested the standard, split-head, and split-king setups as if they were long-term beds. Each configuration stayed in rotation for multi-week blocks so we could see how it handled normal nights, late-night reading, and the small annoyances that show up after the honeymoon period.

For support, we focused on spinal alignment—especially whether hips dropped and whether the lower back felt “held” at different settings. For pressure relief, we ran timed side-sleep sessions and tracked how quickly shoulder or hip discomfort faded after dialing the firmness down.

For motion isolation, our couple testers ran their usual routine of getting in and out, rolling, and shifting positions at night. Cooling checks were straightforward: we used surface-temperature readings and notes from hot sleepers to see whether heat built up over long stretches.

Edge support came down to everyday use—sitting to put on shoes, scooting to the edge, and lying near the perimeter. All observations fed a 3.0–5.0 scoring grid, with support, pressure relief, motion control, and cooling carrying the most weight.

Our Testing Experience

On the standard Dual Comfort, the first thing I noticed was how “normal” the surface looked and felt for an adjustable bed. There’s a gentle lift under the lumbar area once you move into the mid-firm range, and that kept my hips from drifting during back sleep.

The easiest way to use this bed is to make one change, then give it a full night. A small bump firmer made my lower back feel steadier without turning the top into a board. When I softened it too far, I could feel my hips start to drop—useful feedback that the adjustment actually matters.

Across body types, the pattern stayed consistent: Marcus preferred firmer settings for hip support, while Mia softened it for shoulder relief and then nudged it up until her spine felt level. The latex and coil mix gave it a quick rebound, so turning over didn’t feel like fighting slow foam.

Pros & Cons

Details

• Price: Upper mid to premium range, depending on size and promotions
• Firmness: User adjustable, roughly from plush-medium to firm
• Thickness: About 13 inches
• Sizes: Standard sizes (Twin XL through Cal King) plus select split styles
• Materials: Organic cotton stretch-knit cover, silver-infused antimicrobial lining, latex comfort layer, air chambers, pocketed coil support, foam perimeter
• Shipping: Delivered to your door with optional setup services (availability varies)
• Trial Period: 100 Night Promise (in-home trial with refund option if it’s not a fit)
• Warranty: 20-year limited warranty
• Best For: Sleepers who want one shared mattress with tunable support

Review Score

Our Testing Experience

The split-head setup feels like a shared bed with a built-in compromise breaker. The head portion lets partners fine-tune the feel (and head elevation) while the lower section stays connected, so the mattress doesn’t feel like two separate islands.

Jenna and Ethan used this layout the longest. Jenna wanted a little more give under her shoulders, while Ethan preferred more lift through the mid-back. They could both get close to what they wanted without the “two beds pushed together” sensation you get on a full split.

Motion control was solid for a shared surface, but not perfectly isolated—heavy movement still registers lightly through the unified lower section. The biggest day-to-day adjustment was bedding: split-head fitted sheets fit best and keep the top section from bunching.

Pros & Cons

Details

• Price: Premium level, especially when bundled with an adjustable base
• Firmness: User adjustable; partners can tune the head feel independently
• Thickness: About 13 inches
• Styles: Split-head configuration (King setup tested)
• Materials: Same core build—cotton cover, latex, air support chambers, pocketed coils, supportive perimeter
• Shipping: Delivered in larger components; optional setup services may be available
• Trial Period: 100 Night Promise (mattress trial terms apply; non-mattress items may differ)
• Warranty: 20-year limited warranty
• Best For: Couples who want shared space with separate head comfort and position

Review Score

Our Testing Experience

The split-king / side-by-side setup behaves like two independent beds. Each person gets their own firmness control and their own movement zone, which is why this configuration scored best for motion isolation in our testing.

If one partner is restless, it’s the clearest win of the three options. I could climb in late without waking the person on the other half. That said, the center gap is real—you feel it if you try to sprawl across the middle, and making the bed takes more effort than a standard king.

Edge support held up well on each half, especially when set mid-firm to firm. For couples who rarely need to use the middle of the bed and care more about independence, this configuration made the most practical sense.

Pros & Cons

Details

• Price: Highest among the three setups, often because it involves two sides (and commonly two bases)
• Firmness: Fully independent adjustments per side
• Thickness: About 13 inches per side
• Styles: Split king / side-by-side configuration
• Materials: Same latex + air + coil hybrid build on each half
• Shipping: Typically arrives as multiple pieces for easier handling
• Trial Period: 100 Night Promise (trial applies to the mattress components)
• Warranty: 20-year limited warranty
• Best For: Partners who need maximum independence in firmness and movement

Review Score

Start with your non-negotiables: body weight, primary sleep position, and how much you need to separate your sleep from a partner. With iSleep, the adjustable air layer gives you room to tune the feel, but the best results come from making small changes and sleeping on each setting long enough to judge it.

If you sleep alone or want a seamless shared surface, the standard Dual Comfort is the cleanest pick. Lighter side sleepers can soften the bed for shoulder comfort, while back and stomach sleepers usually do better once the setting moves into the mid-firm range. Heavier sleepers can push it firmer to keep the hips from dipping.

If you share the bed and your needs don’t match, choose the configuration based on how independent you want it to feel. Split head is a middle ground for partners who want separate head comfort and elevation but still share most of the mattress. Split king (side-by-side) is the best option when you want maximum motion isolation and completely independent firmness—just expect a real center gap and more bedding logistics.