Question 1

What firmness is best for side sleepers?

Accepted Answer

Medium to medium-soft — specifically 4 to 6 on a 10-point scale. In our XSensor pressure mapping of 38 mattresses, every bed firmer than 6.5 produced peak shoulder pressure above the 32 mmHg capillary-closure threshold for testers under 200 lb. Heavier side sleepers (230+ lb) can move up to 6.5–7 because they compress the comfort layer more, but going firmer than that consistently produces shoulder numbness within the first 90 minutes of sleep.

Question 2

What type of mattress is best for side sleepers?

Accepted Answer

Memory foam and hybrid constructions dominate our side-sleeper rankings. Memory foam delivers the deepest pressure relief (we recorded 24–28 mmHg peak shoulder pressure on top picks); hybrids with a 3-inch foam comfort layer over zoned coils trade ~2 mmHg of pressure relief for better edge support, faster response and cooler sleep. Innerspring without a real comfort layer almost always fails our pressure test for side sleepers.

Question 3

What is the best mattress for side sleepers with hip pain?

Accepted Answer

A medium-soft hybrid with zoned lumbar support (firmness 5–5.5). Our top pick, Helix Midnight Luxe, recorded 26 mmHg peak hip pressure across 145–195 lb testers — 18% below the capillary-closure threshold. For severe hip bursitis or arthritis, adding a 3-inch latex topper to a medium-firm hybrid is often more effective than buying a softer mattress outright, because latex relieves pressure without trapping heat at the hip joint.

Question 4

How thick should a mattress be for side sleepers?

Accepted Answer

At least 11 inches, with a minimum 3-inch comfort layer. Mattresses under 10 inches almost never have enough foam above the support core to let the shoulder and hip sink in properly — we see this most often with cheap online beds and budget innerspring models. For sleepers over 230 lb, look for 12-14 inches and a 4-inch comfort layer.

Question 5

Is memory foam or hybrid better for side sleepers?

Accepted Answer

Memory foam wins on raw pressure relief (24–28 mmHg vs. 27–30 mmHg in our top hybrid picks) and motion isolation. Hybrid wins on cooling (3-5°F cooler at 60 minutes in our FLIR thermal test), edge support, and ease of repositioning. Side sleepers who run cold or sleep alone often prefer memory foam; couples, hot sleepers, and combination side-back sleepers usually prefer hybrid.

9 Best Mattresses for Side Sleepers (2026): 500+ Hours Tested