Serenia 2-1/2-Inch Foam Mattress Topper, Twin 2-1/2-Inch of foam is supportive and comfortable and cushions the body to help you rest peacefully hypoallergenic Orthopedically supportive Cooler sleep than memory foam alternatives Durable and long-lasting; excellent value 2-1/2-Inch of foam is supportive and comfortable and cushions the body to help you rest peacefully Anti-microbial and hypoallergenic Orthopedically supportive Cooler sleep than memory foam alternatives Durable and long-lasting; excellent value