You won't look at sleep the same way after sleeping on the Sealy Opportune II Medium Mattress. With targeted support and SealyCool Gel Memory Foam, you'll get reinforced targeted support for the heaviest part of your body plus cooling comfort to keep you comfortable all night. The Response Pro Encased Coil System, made up of a densely packed system of individually-wrapped, durable coils, reduces motion transfer while providing even more support. And the ComfortLoft Knit Cover with Chill and AllergenProtect provide a cool-to-touch comfort the moment you lay down and it protects your mattress from common allergens like dust mite dander. Designed to work with adjustable bases and available in Twin, Full, Queen, King, Twin XL, Split King, California King, and Split California King sizes.