Seven proven ways to soften, lower, or permanently compress a memory foam pillow that's too tall or too firm - from dryer cycles to filling removal - plus how to know when it's time to replace it.
A memory foam pillow that sits too tall under your head can throw your neck out of alignment as quickly as one that's too flat. The good news: most memory foam pillows can be reshaped, softened, or permanently lowered - you just need the right method for the construction you have.
This guide covers seven techniques our editorial team has tested across solid-block, contoured, and shredded memory foam pillows, plus a clear signal for when flattening is no longer worth the effort and replacement is the smarter call.
Memory foam is viscoelastic - it resists rapid deformation and softens gradually as it absorbs heat. New pillows almost always feel firmer than they will after a 2-4 week break-in, because the foam hasn't conformed to your sleep position yet and the off-gassing process leaves the cell structure stiff.
Three factors drive how a memory foam pillow feels:
Before reaching for a method below, identify which type you have - it determines what will work.
This is the single most effective method for softening and slightly lowering a solid memory foam pillow without damaging it.
The heat softens the foam while the balls compress and redistribute it, knocking down high spots and breaking up stiffness from manufacturing.
No equipment, surprisingly effective. Work the pillow by hand for 5-10 minutes per day for a week:
For shredded memory foam pillows this also redistributes clumped fill - often the real cause of an unevenly tall pillow.
Pre-warming a pillow that feels too firm at the start of the night drops perceived loft by roughly 1/4 to 1/2 inch within 10-15 minutes of contact:
Keep direct heat sources under 130°F and never apply heat through a pillowcase made of synthetic fabric that can melt.
This is the only way to permanently lower a shredded memory foam pillow's loft, and it's reversible.
Work slowly. It's easy to overshoot and end up with a pancake; the bagged foam lets you add some back if you do.
If your pillow lost loft but still has good fill, see our guide on how to fluff a pillow.
If your pillow is a solid block that's permanently too tall, you can shave the bottom layer off with a serrated bread knife or electric carving knife:
This voids most warranties, so weigh that against the cost of replacement.
If the pillow is high-quality but wrong for your head, demote it rather than fight it:
This preserves the pillow's lifespan and avoids waste.
A common Reddit and forum suggestion is to machine-wash the whole pillow to break it in. Don't. Water saturates and tears polyurethane foam cells, leaving permanent flat spots, mildew risk, and a ruined warranty. Almost every major brand (Tempur-Pedic, Casper, Purple) explicitly prohibits it.
Instead:
Most pillows reach their stable feel between two and four weeks of nightly use. If after a month it still feels too firm or too tall and none of the methods above have helped, the pillow is likely the wrong loft for your sleep position rather than under-broken-in.
Quick loft guide by sleep position:
Replacement is the right call when:
A quality memory foam pillow runs $40-$120 and lasts 2-3 years with care. If you're spending more time fighting yours than sleeping on it, replacement is the better economy.
Yes, but only by removing fill from a shredded pillow or trimming a solid pillow with a serrated knife. Heat, kneading, and dryer methods only soften the foam temporarily - the pillow returns to its molded shape once it cools.
Not on low or air-dry settings. High heat (above roughly 130°F) breaks down the polyurethane cell structure and causes permanent indentations or crumbling. Always check the care tag first - a few specialty pillows are dryer-prohibited.
New memory foam pillows are firmest in the first two to four weeks of use. Cool room temperatures (under 68°F) also keep them stiff. Body heat and break-in time soften the foam noticeably; if it's still rock-hard after a month, the density or loft is likely wrong for you.
No. Water tears the cell structure of solid memory foam and creates permanent flat spots, mildew, and odor. Wash only the removable cover; spot-clean the foam itself with a damp cloth and mild soap, then air-dry fully.
Place it under a stack of heavy books or a folded comforter for 8-12 hours. The sustained pressure compresses the foam temporarily. For lasting reduction on a shredded pillow, remove a cup of fill from the inner zipper instead.
Written by
Banner Mattress EditorialThe Banner Mattress editorial team publishes independent mattress reviews, buying guides, and sleep-health advice. Since 2018 we've tested 1,000+ mattresses and 3,000+ pillows, sheets, and bedding accessories in our review lab - every recommendation is hands-on, never sourced from vendor talking points. Affiliate links may earn us a commission, but never change what we recommend.
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