So I'm about 260 lbs and currently on an all-foam mattress that turns into a swamp by 2am. I keep seeing marketing about "open-cell foam" being cooler because air can move through it. But doesn't my weight just crush the cells shut anyway? Are these actually any better for bigger folks or is it just marketing fluff?
Cooling
Are open-cell foams any cooler for heavier sleepers?
I'm not an expert but I think the issue is that any foam compresses under weight, so "opn cell" only helps if the cells stay open. At 260 you're probably sinking in enough that they don't. But maybe the newer high-density open-cell stuff is different?
lol @ "marketing fluff". Honestly most of it is. I'm ~230 and tried one of those "cooling" open-cell mattresses. Felt the same as my old memory foam after an hour. The only thing that actually helped was getting a latex hybrid with coils underneath. Foam on foam is just a heat trap no matter what they call it.
Following because I'm in the same boat. I've read that open-cell foam has better airflow but heavier people compress it more. Is there a weight limit where it stops mattering?
I work in a mattress store (don't hate me) and the honest answer is that open-cell foam is cooler than traditional memory foam, but "cooler" is relative. For heavier sleepers, the compression thing is real. The cells do collapse more under weight, so you lose some of the airflow benefit. A hybrid with a coil base and a thinner open-cell comfort layer is usually a better bet than a thick all-foam open-cell mattress.
That makes sense. So basically if you're heavy, go hybrid or lattex, not just open-cell all-foam.
Also, half the "cooling" is just the cover. They put some phase-change material in the fabric and call tye whole mattress cooling. The foam underneath is the same heat sponge.
So is there any point in paying Extra for open-cell if you're over 200 lbs? Or should I just save my money and get a regular hybrid?
If you're over 200, I'd say prioritize coils and a breathable cover over the open-cell marketing. If the open-cell layer is thin (like 2-3 inches) over coils, it can help a little. But if it's a 6-inch open-cell foam block, you're probably not getting much benefit.
This thread is making me feel better about my cheap innerspring with a latex topper. Not fancy but it doesn't turn into a sauna.
Yeah I think I'm gonna skip the open-cell premium. Thanks for the reality check.
One more thing: sleeping hot is also about your bedding and room temp. I switched to linen sheets and a lighter duvet and it made more difference than the mattress did.
True. And a mattress protector can block airflow too. But yeah, for heavy sleepers, the foam density and thickness matter more than the "open-cell" label.