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The Oki-Oki Okisoft is a 10-inch all-foam mattress with a medium-soft feel, CertiPUR-US and OEKO-TEX certified foams, a 365-night trial, and a 10-year warranty. At around $500 for a queen, it delivers solid pressure relief for side sleepers and lighter-weight back sleepers on a budget.
Oki-Oki Okisoft
7.4/10
- Deep contouring memory foam relieves pressure at hips and shoulders for side sleepers
- Ice Yarn cover with airflow holes helps regulate temperature
- CertiPUR-US and OEKO-TEX certified foams (no harmful chemicals)
- Impressive 365-night trial for a budget brand
- Excellent motion isolation, couples-friendly
- Edge support is weak, you're mostly confined to the center of the mattress
- Memory foam can retain heat despite the Ice Yarn cover
- Not ideal for sleepers over 230 lb or stomach sleepers over 130 lb
- Only one firmness option (medium-soft)
- 10-year warranty is shorter than most comparable brands
For budget side sleepers under 230 lb who want a long trial and CertiPUR-US foam, the Okisoft delivers above its price point. The trade-off is limited firmness choice, modest edge support, and a shorter warranty than premium competitors.
What is the Oki-Oki Okisoft?
Oki-Oki is a direct-to-consumer mattress brand positioned at the budget end of the online foam market. The Okisoft is their plushest model in a lineup of four mattresses (Okisoft, Okiflex, Okieasy, and Okifirm). The name nods to Japanese-inspired minimalism, and the construction is straightforward: three layers totaling 10 inches, shipped compressed in a box.
The construction breaks down as follows:
- Ice Yarn cover: a breathable, cool-to-the-touch knit cover with air holes to improve airflow.
- 3-inch memory foam comfort layer: high-grade memory foam for pressure relief and body contouring.
- 7-inch high-density polyurethane base: a two-part support core that prevents excessive sinking and gives the mattress its shape.
Both the memory foam and the support core carry CertiPUR-US and OEKO-TEX certifications, which means they've been independently tested for harmful chemicals, VOCs, and off-gassing levels. For a mattress in this price range, that's a meaningful credential.
Who is the Okisoft for (and who it isn't for)
In our testing, the Okisoft works best for a specific sleeper profile. It's ideal for side sleepers under 230 lb who want cloud-like contouring at the hips and shoulders, where pressure points concentrate most during side sleeping. The deep memory foam sink reduces that pressure noticeably compared to firmer all-foam beds.
It also works for lightweight back sleepers under 130 lb who prefer a softer surface. At that weight range, the 7-inch support core provides enough pushback to keep the spine roughly aligned without the bed feeling too stiff.
The Okisoft is a harder recommendation for:
- Sleepers over 230 lb: the medium-soft foam compresses too much under higher body weight, reducing spinal support and accelerating wear.
- Stomach sleepers: the plush feel lets the hips sink, which forces the lumbar into extension, a common cause of lower back strain.
- Hot sleepers: the Ice Yarn cover helps at the surface, but the dense memory foam beneath still traps body heat in warm rooms.
- Those who need strong edge support: sitting or sleeping near the perimeter reveals significant edge compression, a typical limitation of all-foam budgets.
Comfort and firmness
The Okisoft sits at around 5 out of 10 on the firmness scale, which most testers describe as medium-soft to plush. The initial feel is a soft, enveloping sink, followed by the memory foam conforming around shoulders and hips over the first 30 to 60 seconds of lying down.
This is a classic side sleeper feel. The hips and shoulders press into the foam rather than being pushed back against, which reduces pressure. For back sleepers at light-to-average weight, the support core holds the spine well enough, but the soft comfort layer doesn't provide the lumbar reinforcement you'd find in a zoned design.
Performance: cooling, motion isolation, and durability
Cooling
The Ice Yarn cover creates a noticeably cool-to-touch surface, and the perforated foam layers improve airflow compared to solid-cast memory foam. In practice, the surface temperature stays reasonable for the first few hours. Hot sleepers in warm climates may still find the mattress retains body heat over a full night's sleep, because the memory foam absorbs and holds warmth. If heat is your primary concern, a hybrid or gel-infused design with coil airflow will perform better.
Motion isolation
Motion isolation is where the Okisoft genuinely excels. The dense foam absorbs movement locally without transferring it across the surface. In our testing, a glass of water placed on one side showed almost no ripple when we pressed firmly on the other side. For couples with different sleep schedules, this is a real advantage, and it's one area where all-foam designs outperform coil-based beds.
Durability and longevity
The 10-year warranty is standard for the budget segment, though shorter than the 15 to 20-year warranties offered by premium brands. Medium-soft foam at this price point will typically show comfort-layer compression after 4 to 6 years of nightly use by an average-weight sleeper. Rotating the mattress 180 degrees every 3 to 6 months, as Oki-Oki recommends, helps slow that process. The mattress is not flippable as the support core is designed for one orientation only.
Price and sizes
| Size | Dimensions | Approx. price |
|---|---|---|
| Twin | 39" x 75" | From $320 |
| Twin XL | 39" x 80" | From $360 |
| Full | 54" x 75" | From $440 |
| Queen | 60" x 80" | From $500 |
| King | 76" x 80" | From $640 |
| Cal King | 72" x 84" | From $640 |
Prices fluctuate with promotions. Oki-Oki periodically discounts all models sitewide. The queen at around $500 regular price is competitive for a CertiPUR-US all-foam with a 365-night trial.
Trial, shipping, and warranty
The 365-night sleep trial is one of the longest in the budget segment, putting the Okisoft on par with Saatva and DreamCloud at a fraction of the cost. If the mattress doesn't work out, Oki-Oki will arrange pickup and donate it rather than asking you to figure out return shipping.
Shipping is free within the contiguous US, compressed in a box. Allow 24 to 48 hours for the foam to expand to full height after unboxing. The 10-year limited warranty covers manufacturing defects and indentations deeper than industry standard thresholds.
The Okisoft is also compatible with adjustable bed frames as the foam layers flex without resistance when the base articulates. It works equally well on platform frames, box springs, or slat systems with gaps no wider than 3 inches.
Okisoft vs. alternatives
The Okisoft competes directly with other budget all-foam DTC brands like Zinus, Lucid, and Sweetnight. Compared to those, the 365-night trial is a meaningful differentiator. The OEKO-TEX certification alongside CertiPUR-US is also above average for the price point.
Against mid-tier competitors like the Nectar Original (around $800 queen), the Okisoft is noticeably softer and less durable but significantly cheaper. If your budget extends into the $900 to $1,100 range, you get substantially better lumbar support engineering and longer warranty coverage. See our best mattresses for side sleepers for a full comparison at every budget level.
The Oki-Oki Okisoft is a legitimate budget pick for side sleepers under 230 lb who want a long trial period and certified foam at a low price. Its weaknesses, limited firmness options, modest edge support, and a 10-year warranty ceiling, reflect the price point honestly. If longevity and lumbar zoning matter to you, step up to a mid-tier foam with a 20-year warranty.
Frequently asked questions
Is the Oki-Oki Okisoft good for back pain?
It provides decent pressure relief that can ease mild back discomfort for side sleepers. The memory foam conforms around the lumbar, but there is no zoned firmness system targeting the lower back specifically.
How long does the Oki-Oki Okisoft last?
Expect 5 to 7 years of good comfort performance for a sleeper under 180 lb with regular rotation. Heavier sleepers or those who don't rotate may see comfort-layer compression closer to 3 to 4 years. The 10-year warranty covers defects, but normal softening of the comfort layer over time is standard and not typically covered.
Is the Okisoft flippable?
No. The mattress is one-sided, with the memory foam comfort layer on top and the support core below. Rotating it 180 degrees every 3 to 6 months is recommended to even out wear.
Can the Okisoft work on an adjustable base?
Yes. As an all-foam mattress without coils, it flexes freely with adjustable bases and doesn't kink or crack. It's compatible with most standard adjustable frames.