Overstock Mattress Reviews

Across this group, the split was clear: the O-Sleep foam models prioritize motion control and pressure relief, while the hybrid feels more lifted and responsive. For my lower back, the 10-inch and 12-inch foam versions kept my hips settled without feeling flat. The 8-inch ran too shallow for daily use, and the hybrid nudged me into a straighter, more “on-top” posture.

Marcus tested from the heavier, hotter-sleeper angle. The 8-inch felt too thin under his hips. The 10- and 12-inch foam models were more workable, but he still noted mild warmth. The hybrid was his easiest match because the coil core kept his midsection higher and allowed more airflow.

Mia needed deeper shoulder cushioning than the 8-inch could give. She liked the 10-inch as a better balance, and the 12-inch became her pick for longer side-sleep runs because it reduced pressure without twisting her spine. The hybrid felt firmer at the shoulder for her lighter build.

From Jenna’s shared-bed testing, the foam models muted partner movement best. The hybrid passed a little more bounce across the surface, but the edges were noticeably sturdier for sitting and using the full width of the mattress.

We used the same approach we outline in how we test mattresses across all four mattresses. Each spent at least a week in a real bedroom, then returned to the studio for controlled side-by-side checks.

For mattress support and alignment, we photographed side profiles under different weights and watched for hip sag or midsection dip. We also tracked how backs and hips felt the next morning after full nights of use.

Pressure relief checks leaned on Mia’s shoulders and hips, plus timed side-sleep holds. We also used pressure mapping in the studio to spot hot zones, then compared notes across body types.

Cooling, motion isolation, and responsiveness came from repeatable drills: overnight temperature notes, partner-movement tests, and quick-change mobility checks. For edge support, we sat, knelt, and rotated near the perimeter to see how stable it stayed.

Our Testing Experience

The 8-inch O-Sleep arrived compact and set up quickly. I started it in a guest room because this height usually makes more sense for occasional use than as a daily mattress. On my back it felt medium-firm and steady, but you can feel the support core sooner than on thicker beds.

Marcus pushed through the comfort layer faster and wanted more cushion under his hips. Mia, as a lighter side sleeper, hit a similar ceiling: her shoulder didn’t settle into a deep pocket, so long side-sleep stretches felt firm.

As a secondary bed, the tradeoff worked. The foam stayed quiet, and motion died quickly when someone shifted or sat down on the other side.

Pros & Cons

Details

• Price: Budget-priced; varies by size and promotions
• Firmness: Medium-firm (about 6/10)
• Height: 8 inches
• Construction: Memory foam comfort over a high-density foam core
• Cooling: Breathable cover; basic airflow design
• Motion Isolation: Very strong
• Edge Support: Soft when sitting on the perimeter
• Best For: Guest rooms, kids/teens, lighter sleepers
• Trial/Returns/Warranty: Terms vary by listing; many O-Sleep listings show around a 1-year limited warranty

Review Score

Our Testing Experience

The 10-inch O-Sleep felt like the most balanced foam option. The surface had enough give for side sleep, but it still kept my hips supported when I rolled to my back—important on mornings when my lower back feels touchy.

Marcus said this was the point where the mattress stopped feeling thin and started feeling supportive under his hips. Mia also reported noticeably better shoulder cushioning than on the 8-inch, with a smoother transition into the support foam.

Jenna’s partner-movement checks stayed very quiet. She felt only a soft lift when someone got in or out, and the bed didn’t amplify shifting during the night.

Pros & Cons

Details

• Price: Budget-to-midrange; varies by size and promotions
• Firmness: Medium-firm (about 6–6.5/10)
• Height: 10 inches
• Construction: Memory foam comfort and transition foam over a dense core
• Cooling: Breathable cover; moderate foam warmth
• Motion Isolation: Excellent
• Edge Support: Average; compresses under heavier sitting
• Best For: Most average-weight sleepers, mixed positions
• Trial/Returns/Warranty: Terms vary by listing; many O-Sleep listings show around a 1-year limited warranty

Review Score

Our Testing Experience

The 12-inch O-Sleep had the deepest cushion in this group. My shoulders and hips sank in more before the support core pushed back, and that made side sleeping feel easier on longer nights.

Marcus liked it on his back but felt it get a bit too plush on his stomach as his hips settled lower. Mia treated it as the comfort winner because it reduced shoulder pressure without forcing her into a twist.

Jenna rated it as the calmest option for motion isolation, with the same tradeoff you’d expect from thicker foam: slower, “huggy” movement when rolling over.

Pros & Cons

Details

• Price: Budget-to-midrange; varies by size and promotions
• Firmness: Medium (about 5.5–6/10)
• Height: 12 inches
• Construction: Thicker foam comfort over a high-density core
• Cooling: Breathable cover; deeper foam contour
• Motion Isolation: Outstanding
• Edge Support: Usable when lying down; softer for sitting
• Best For: Side sleepers and plush-foam fans
• Trial/Returns/Warranty: Terms vary by listing; many O-Sleep listings show around a 1-year limited warranty

Review Score

Our Testing Experience

This 12-inch hybrid came in under a more generic listing, which is common for value hybrids sold through marketplaces. The feel was immediately more lifted than the foam models: the surface bounced back faster, and I sat higher with the coil unit doing most of the work.

Marcus preferred it because his hips stayed parked and airflow felt better on warmer nights. Mia liked how easy it was to move on, but she didn’t get the same shoulder depth she felt on the 12-inch all-foam bed.

Jenna felt more bounce travel across the bed than on the O-Sleep mattresses, but it faded quickly. The edges were much sturdier for sitting and using the full width.

Pros & Cons

Details

• Price: Varies widely by listing and promotion
• Firmness: Medium-firm to firm (about 6.5–7/10)
• Height: 12 inches
• Construction: Foam comfort over pocketed coils (details vary by seller)
• Cooling: Better airflow than all-foam for many sleepers
• Motion Isolation: Good, but more bounce than dense foam
• Edge Support: Stronger perimeter support
• Best For: Back sleepers, heavier sleepers, people who want bounce
• Trial/Returns/Warranty: Policies and warranty length vary by seller

Review Score

Start with sleep position and body weight. A lighter side sleeper like Mia benefits from a thicker foam stack, while a heavier back sleeper like Marcus tends to do better on coils and a firmer base. Temperature sensitivity comes next, because memory foam often trades airflow for that classic contouring feel.

For a light-weight side sleeper, the 12-inch O-Sleep model is the safer bet. That kind of sleeper often fails to sink adequately into thinner foam, and the thicker build gave Mia the deepest shoulder relief.

For an average-weight back sleeper, the 10-inch O-Sleep usually hits the right stride. My nights showed steady lumbar support without the extra sink of the 12-inch version. If that person occasionally shifts to the side, the 10-inch still provides enough surface give.

For a hot sleeper or heavier sleeper, the 12-inch hybrid becomes the safer bet. Under those circumstances, all-foam beds can feel warmer and let hips sink deeper. The coil core helps heat vent and keeps the frame more elevated.

For a heavier couple sharing a smaller room, I lean toward the hybrid again. Jenna’s motion tests stayed within acceptable limits, and the stronger edges let two people use more of the width. If a couple is in a more moderate weight range and wants maximum motion isolation, the 10- or 12-inch all-foam beds do that job better.