If you're looking for breathable, supportive comfort that will last, look no further. Serta's Serta Calming Haven 9.5"" Medium Eurotop Mattress is comprised of premium foams such as Serta PillowSoft Aire for cushioning comfort and the breathable CoolTwist Gel Foam to keep you dreaming comfortably. Below this, the 532 Continuous Support Innerspring System with rows of head-to-toe continuous coils provides excellent body support while helping to reduce motion transfer.