by Our #1 Recommended Mattress
After testing 20+ mattresses across every category, this is the one we recommend first.
Saatva Classic. From $1,095
365-night trial · Lifetime warranty · Free white-glove delivery
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A soft mattress isn't for everyone — but for the right sleeper, it's transformative. The key is knowing whether your body type and sleep position actually benefit from softer pressure relief or need firmer support.
Who Benefits Most from a Soft Mattress
- Side sleepers — the #1 group who need soft mattresses. Shoulder and hip pressure points require cushioning to prevent pain and circulation restriction
- Lightweight sleepers (under 130 lbs) — lighter bodies don't compress medium or firm mattresses enough to reach the comfort layer. A soft mattress provides the pressure relief that medium gives heavier sleepers
- Pressure point sleepers — shoulder pain, hip pain, or joint sensitivity benefit from deeper contouring
- Those who prefer "sleeping in" rather than "sleeping on" — the enveloping feel of soft foam reduces the sensation of firmness against the body
Who Should Avoid Soft Mattresses
- Stomach sleepers — soft surfaces let the pelvis sink, causing lumbar hyperextension and back pain
- Heavy sleepers (over 230 lbs) — soft mattresses compress too deeply, removing support and causing sag
- Back pain sufferers who need lumbar support — most orthopedic recommendations favor medium-firm, not soft
- Combination sleepers who need easy repositioning — soft foam resists movement
Soft Mattress Firmness Scale
| Rating | Feel | Best For |
|---|---|---|
| 1–2/10 | Extra Soft / Ultra Plush | Very light side sleepers (<100 lbs) |
| 3–4/10 | Soft / Plush | Side sleepers 100–150 lbs |
| 4–5/10 | Medium-Soft | Side sleepers 150–200 lbs |
Top Soft Mattress Picks
Puffy Original (4/10 soft): Puffy's adaptive cloud foam provides exceptional pressure relief for side sleepers without excessive sinkage. Best for 100–200 lb side sleepers. 101-night trial, lifetime warranty.
Organic / Latex Pick
PlushBeds Botanical Bliss — From $1,449 Queen
GOLS certified organic latex, GOTS cotton/wool cover. 25-year warranty, made in California.
Amerisleep AS5 (3/10 soft): Amerisleep's softest model uses HIVE zoning even in soft configuration — firm lumbar support within a soft sleeping surface. Best for lightweight side sleepers who still need lumbar alignment.
PlushBeds Botanical Bliss (Soft ILD): PlushBeds' soft latex configuration — GOLS-certified, responsive soft feel that doesn't trap heat like soft memory foam. Best soft option for eco-conscious and hot sleepers.
FAQ
Is a soft mattress bad for your back?
Not necessarily — it depends on your sleep position and weight. Side sleepers typically benefit from softer mattresses because the cushioning reduces pressure on hips and shoulders while allowing proper spinal alignment. Back and stomach sleepers usually need firmer support. The key is matching firmness to your body and position, not assuming "firm = better for back."
Can a soft mattress cause back pain?
Yes, for the wrong sleepers. A soft mattress causes back pain when it allows the spine to curve out of alignment — most commonly in stomach sleepers (pelvis sinks) or heavy back sleepers (mid-section hammocks). Side sleepers typically do not experience increased back pain on appropriate soft mattresses.
How do I make my mattress softer?
Add a soft mattress topper (2–3 inches of ILD 14–19 latex or memory foam). This is the most effective and reversible method. Other approaches: use a lower-profile box spring or platform to reduce surface tension, or break in the mattress by walking across it daily for 2–4 weeks. A topper costs $100–$400 and can transform a medium mattress to a soft feel.