Newton Baby Crib Mattress

"5.0 out of 5 stars" - ***UPDATE***My daughter ended up using this for two years. It never sagged or got an indentation. It was so easy to clean and air dry. I only stopped using it when my daughter got too tall for a crib and I got her a twin bed.Another bonus - since this is such a high quality mattress, you can sell it when you're done. I sold mine at a local consignment sale for $50 after two years of use - so happy I got this and if I had another baby I'd buy a new one to bring them home from the hospital to.I never put any sheet or anything on it. I highly recommend HALO sleep sacks for babies and toddlers. No need for any sheets or blankets on the bed.***ORIGINAL REVIEW BELOW***When my daughter was around 6 months old and learned to roll over, my husband and I were scared half to death to frequently find her face down, hands cupping her cheeks, during her naps. We would immediately turn her head to the side and a couple times she gasped for air when we did. Some people tried to assure me that, once babies can roll over, there's nothing to worry about when they sleep since they'll automatically turn their heads when they need air. However, after looking into it, I found research that babies who are used to sleeping on their backs, once they finally roll over and sleep on their stomachs for the first time, have a 20% or so higher chance of suffocating than infants who sleep on their stomachs from birth, because they aren't used to it and sometimes don't rouse themselves in time.We weren't able to sleep without constantly checking on her. I researched options and found the Newton breathable crib mattress. After reading everything on their website, I decided it was the one. It doesn't off-gas, it doesn't have chemicals, it's mostly air. We ordered it on Prime instead of from their website directly to get faster shipping. Once it arrived my husband and I, like others here, tested it by pressing our faces down against it and trying to breathe - it is a bit stuffy, of course, but you can breathe. And it doesn't smell like anything. No need to air it out before baby uses it.It is more firm than our "firm" crib mattress we were using previously. Our daughter doesn't leave any indent in it at all. It looks incredibly easy to clean; just use some cold water. It's some kind of polymer in a 3-D web. The cover is padded but has holes and layers so that it doesn't block air. Don't put any sheet or water-proof cover on this mattress, as that would block the air. It really doesn't need those things, since even if pee leaked or spit up got on it you just wash it off. It has nothing that could get moldy like other mattresses.Of course, we don't want to teach our daughter that it's okay to sleep with her face down, so if we find her like that, we do turn her head. But now we aren't constantly worried about her suffocating if we happen to not notice her being face down. For peace of mind, I highly recommend this mattress. We're going to move our daughter back to her original mattress once she's a toddler and save this one for when we have the next baby.