Cool Gel 14" Medium Gel Memory Foam and Memory Foam Mattress The Mattress: Cool Gel Memory Foam and Memory Foam Mattress ($390, originally $436) Comfort Level: Medium The Thickness: 14 inches Why People Love It: Made with gel memory foam that keeps you cool all night, this is a great option for sweaty sleepers. Image Source: wayfair.com Cool Gel Memory Foam and Memory Foam Mattress $390 from wayfair.com Buy Now