Delivers better pressure relief so you sleep longer, deeper and wake refreshed. Serene performance foam is the most advanced foam on the marker and is not temperature sensitive so it remains comfortable and supportive regardless of the season. More supportive than memory foam! Durable topper is 1 1/2” thick, adding a layer of comfort to any RV or home mattress without extra thickness. Cool touch polyester nylon jersey knit cover with breathable mesh gusset and stretch to fit skirt. Hypoallergenic with machine washable cover for easy care. Comfort Tech™ Serene Foam® Mattress Topper