If you're in the market for a new mattress, no doubt Cyber Monday is the perfect chance. While the brand's Original Foam Mattress ($591-$1,271, originally $695-$1,495) is a bestseller, and on sale, so is its more expensive version. The Casper Sleep Nova Foam Mattress ($767-$1,536, originally $1,095-$2,195) is the brand's higher, hybrid model that offers much more back support. It's even an editor favourite — you can read the full review here.