The 4.5” profile sofa mattress has Memory Foam and is designed to ensure your guests sleep as comfortably as possible after a night on your sleeper sofa. Starting with the top layer of 1.5-inch breathable memory foam that works with the support layer providing you with the ultimate sleeping experience. The 3-inch support base layer maintains the strength and effectiveness of the layers. The two layers work together to bring you the relaxation you crave and the ultimate sleeping experience. Covered with a beautifully detailed knit cover for breathability, this elegant cover moves with you. The 4-way stretch conforms to your body for comfort working with the top layer of memory foam to optimize its contouring properties.