by Quick answer: Choose a pillow by your sleep position. Side sleepers need a high, firm loft (over 5"), back sleepers a medium loft (3"–5"), and stomach sleepers a low, soft loft (under 3"). The goal is keeping your head and neck aligned with your spine.
By the MattressNut editorial team · Updated June 2026
Choosing a Pillow Explained
The right pillow keeps your spine in a neutral line all night. Your sleep position decides what that takes, because it changes the gap between your head and the mattress. The two factors to match are loft (the pillow's height when lying flat) and fill (the material inside).
Key Facts: By Sleep Position
- Side sleepers — high loft, firm (over 5"). You need to fill the gap between your ear and outer shoulder so your neck stays straight. Broader shoulders need a loftier pillow. A firm gusseted memory foam, latex, or high-fill down works well.
- Back sleepers — medium loft (3"–5"). Support the natural curve of the neck without pushing the head forward. Contoured memory foam or latex is a good fit.
- Stomach sleepers — low loft, soft (under 3"), or none. A thin, soft pillow prevents the neck from bending up awkwardly. Some stomach sleepers also place a thin pillow under the pelvis to ease lower-back strain.
- Combination sleepers — medium or adjustable. A medium loft with adjustable fill (shredded foam or latex) lets you tune the height as you switch positions.
Choosing the Fill
Fill changes feel and support. Memory foam contours closely but holds heat, so look for gel infusion if you sleep warm. Latex is supportive and breathable and suits most positions, especially side sleepers. Down is soft and moldable, good for stomach sleepers and anyone who likes to shape their pillow. Polyester (down alternative) is the budget pick, soft and light but quick to flatten.
Tips & Mistakes to Avoid
Don't ignore your mattress and body size. A firmer mattress lets your shoulder sink in less, which can call for a slightly higher pillow, and shoulder width matters most for side sleepers. If allergies are a concern, latex and certain synthetics are naturally more resistant to dust mites.
Replace pillows every 1 to 3 years. A quick test: fold the pillow in half and let go. If it doesn't spring back, it's lost its support and a fresh pillow won't undo the neck aches.
The Saatva Angle
A pillow only does its job in partnership with the mattress, since both determine how far your shoulder sinks and where your head ends up. If you've tried the right loft and still wake with neck or shoulder pain, the mattress firmness may be working against you, not just the pillow.
Bottom Line
Match loft to position first: high and firm for side, medium for back, low and soft for stomach. Then pick a fill that fits your feel and temperature preferences, and replace it once it stops springing back.
Bottom line: Pick pillow loft by sleep position, side high, back medium, stomach low, then choose a fill that keeps your spine neutral.
Related: our full Saatva mattress review.