The Slumberland Air 9.0 Memory mattress promises ... independent lab tests can tell you if this mattress will last as long as you expect, or if it’ll become too soft or start to sag. Read our full ...

The Slumberland Air 6.0 Memory mattress promises ... independent lab tests can tell you if this mattress will last as long as you expect, or if it’ll become too soft or start to sag. Read our full ...

Twin XL This mattress is the same distance across as a standard twin, but it’s four inches longer — so your bedroom will need to be at least that much bit bigger too. Full A bedroom at least 9 ...

If you have a smaller space such as a studio apartment or dorm room, check out the best twin mattresses, tested and reviewed by our CNET sleep experts. Lindsay Boyers is a certified nutritionist ...