The overall best foam mattress that's too soft for those who want a plush feel is the Saatva Rx, with its dual-sided firmness and certified materials. A close alternative is the Nectar Premier Copper, which offers superior pressure relief and cooling gel memory foam.
If you love the feeling of sinking into a cloud but worry about support, we’ve ranked the best foam mattresses that are intentionally soft (plush to medium-soft). Based on specs, certifications like CertiPUR-US and OEKO-TEX, and aggregated owner reviews, these picks prioritize pressure relief without sacrificing spinal alignment.
We compared firmness levels, trial periods, and materials to find foams that are truly too soft for stomach sleepers but ideal for side sleepers or those with pain points. Owners report deep sinkage but also overheating concerns, so we highlight cooling features where available.
Saatva Rx
The Saatva Rx features a dual-sided design: plush on one side, medium-firm on the other, making it adjustable for sinkage preference. It uses CertiPUR-US certified foams and organic cotton cover. Owners rave about pressure relief for hips and shoulders, though some find even the plush side too firm.
Check current priceHow we research and rank
We do not take payment for placement and we do not physically test products. Rankings come from manufacturer specifications, material certifications (CertiPUR-US foam, OEKO-TEX textiles), and the weight of aggregated verified owner reviews, analyzed for durability, heat retention and sagging. The scores in this guide are MattressVetted editorial research ratings — our assessment of the available evidence, not customer star averages. See how we rate.
How this guide was researched
- Final picks: 7 products, chosen from the models most searched and bought in this category.
- Evidence used: manufacturer specifications, independent certifications (CertiPUR-US foam, OEKO-TEX textiles), and aggregated verified-purchase owner reviews.
- Scoring weights: Construction 20%, Comfort 20%, Support 20%, Temperature 15%, Durability 10%, Motion and edge 5%, Trial and warranty 5%, Value 5%.
- Testing: we do not physically test products. Scores are our editorial research assessment, not a customer star average.
- Research reflects: July 2026.
Full method on our how we rate page.
The picks, compared
Saatva Rx
Side sleepers with chronic pain who want a plush, medical-grade foam bed · Type: Foam | Firmness: Plush (adjustable to medium-firm) | Trial: 180 nights
The Saatva Rx features a dual-sided design: plush on one side, medium-firm on the other, making it adjustable for sinkage preference. It uses CertiPUR-US certified foams and organic cotton cover. Owners rave about pressure relief for hips and shoulders, though some find even the plush side too firm.
What owners report: Owners report significant pain relief, especially for back and joint issues. Common themes include excellent motion isolation and a slow-sinking feel. A minority mention the bed being warmer than expected.
- Adjustable firmness offers long-term flexibility
- Excellent pressure relief for side sleepers
- Organic cotton cover is breathable and sustainable
- Very expensive
- Heavy and difficult to move
Nectar Premier Copper
Hot sleepers who want a soft foam with active cooling · Type: Memory Foam | Firmness: Medium-soft (5) | Trial: 365 nights
This mattress combines gel memory foam with copper fibers to wick heat, scoring high on temperature regulation. It's medium-soft (5/10) with deep contouring. Owners confirm it sleeps cooler than standard memory foam, though some still find it warm.
What owners report: Many owners praise the cooling effect and pressure relief. Common complaints include lack of edge support and a strong initial odor that dissipates within days.
- Copper-infused foam reduces heat retention
- Great motion isolation for couples
- Lifetime warranty adds confidence
- Edge support could be better
- Not ideal for stomach sleepers
Layla Memory Foam Mattress
Side sleepers who want a flippable soft/firm option · Type: Memory Foam | Firmness: Soft (3) or Firm (7) | Trial: 120 nights
The Layla is flippable: one side soft (3/10), other firm (7/10). The soft side uses copper-infused gel memory foam for cooling and pressure relief. Owners love the versatility, though some find the soft side too soft for support.
What owners report: Owners appreciate the two firmness options and motion isolation. Some report the soft side causes hip sinkage, while the firm side is better for back sleepers.
- Flippable design offers two feels in one
- Copper-infused foam helps dissipate heat
- Great pressure relief on the soft side
- Soft side may lack support for heavier sleepers
- Mattress has a slight chemical smell initially
Zinus Green Tea Cooling Gel Memory Foam Mattress
Budget-conscious shoppers wanting a soft, affordable foam mattress · Type: Memory Foam | Firmness: Medium-soft (4) | Trial: 100 nights
The Zinus Green Tea mattress is a budget-friendly option with a plush feel (rated medium-soft). It contains green tea extract and charcoal for odor control and cooling gel. Owners report good value for the price, though durability is a common concern after a few years.
What owners report: Many owners find it comfortable initially but note sagging after 2-3 years. Positive feedback includes motion isolation and softness for side sleeping.
- Very affordable price point
- Lightweight and easy to set up
- Green tea and charcoal reduce odors
- Durability concerns over time
- Limited edge support
Tuft & Needle Mint
Sleepers who want a soft foam but with a bit more support · Type: Foam | Firmness: Medium-firm (6) | Trial: 100 nights
While not ultra-soft, the Mint mattress is a medium-firm (6) that still offers adaptive foam comfort. It uses T&N Adaptive Foam for contouring without deep sinkage. Owners appreciate the balance of softness and support, making it a good transition for those worried about too-soft beds.
What owners report: Owners like the slight bounce and cooling gel beads. Some wish it were softer, but many report it's perfect for combination sleepers.
- Good balance of softness and support
- Cooling gel infusions help regulate temperature
- Graphite and ceramic gel keep it cooler than traditional foam
- Not plush enough for those wanting extreme softness
- May be too firm for lightweight side sleepers
Brooklyn Bedding Signature Hybrid (Soft)
Sleepers wanting a soft foam feel with coil support for edge stability · Type: Hybrid | Firmness: Soft (3) | Trial: 120 nights
The Signature Hybrid in soft (3) combines foam comfort layers with pocketed coils for added support and airflow. It's CertiPUR-US certified and has a quilted cotton top. Owners report it sleeps cooler than all-foam mattresses and offers better edge support.
What owners report: Owners love the combination of softness and support, especially for side sleeping. Some note the soft option is very soft, which may not suit everyone.
- Coils provide strong edge support and durability
- Excellent cooling compared to all-foam
- Adjustable firmness options available
- Heavier and more expensive than all-foam
- Coils may be felt by some lightweight sleepers
Amerisleep AS3
Value seekers wanting a medium-soft foam with pressure relief and cooling · Type: Memory Foam | Firmness: Medium-soft (5) | Trial: 100 nights
The AS3 is a medium-soft (5) memory foam mattress with a breathable cover and open-cell foam for temperature regulation. It is CertiPUR-US and OEKO-TEX certified. Owners praise its pressure relief and minimal motion transfer, but some want more sinkage.
What owners report: Many owners find it comfortable and cool. Complaints are rare but include a slight initial smell.
- Good pressure relief for side sleepers
- Cooler than average memory foam
- CertiPUR-US and OEKO-TEX certified for safety
- May not be soft enough for extreme plush lovers
- No handles for easy moving
Frequently asked questions
Is a too-soft foam mattress bad for your back?
For most people, a very soft mattress can cause misalignment, especially for back and stomach sleepers. However, side sleepers often benefit from extra cushioning at hips and shoulders. Look for a mattress that offers pressure relief without excessive sinkage, ideally with zoned support or adjustable firmness.
What makes a foam mattress 'too soft'?
A mattress is considered too soft if it does not provide adequate support to keep the spine aligned. Typically, softness is measured on a firmness scale of 1-10, with 1 being extremely soft. Any mattress below a 4 is likely too soft for most sleepers, leading to a 'hammock' effect.
Who should sleep on a soft foam mattress?
Soft foam mattresses are best for side sleepers, lightweight individuals, and those with pressure point issues like arthritis. They provide cushioning that relieves pressure on hips and shoulders. Stomach sleepers and heavier people generally need a firmer surface to avoid spinal misalignment.
How can I tell if a foam mattress is certified safe?
Look for certifications like CertiPUR-US (ensures foams meet standards for emissions, durability, and content) and OEKO-TEX Standard 100 (tests for harmful substances). These indicate the mattress is low in VOCs and free from heavy metals. Many reputable brands list these on their spec sheet.
Do soft foam mattresses sleep hot?
Traditional memory foam can retain heat, but many modern soft mattresses incorporate cooling technologies like gel infusions, copper, graphite, or breathable covers. Look for open-cell foam, phase-change materials, or hybrid designs with coils for better airflow.
The verdict
For the best overall soft foam mattress, the Saatva Rx stands out with its adjustable firmness and medical-grade materials. For cooling, choose the Nectar Premier Copper. Budget-shoppers should consider the Zinus Green Tea, though be mindful of durability.
