Increase your sleeping comfort level with the soft performance of the Therapedic Zero Flat Mattress Topper. Specially designed with a 2 inch memory foam core surrounded by lofty down alternative fill, you can enjoy a restful sleep night after night. Specially designed with a 2 inch memory foam core surrounded by lofty down alternative fill, you can enjoy a restful sleep night after night. Topper will stay supportive in any sleep position. Twin topper measures 75 " L x 38 " W. Twin XL topper measures 80 " L x 38 " W. Full topper measures 75 " L x 54 " W. Queen topper measures 80 " L x 60 " W. King topper measures 80 " L x 76 " W. California King topper measures 84 " L x 72 " W. 100% polyester. 100% polyurethane fill. Machine wash. 2-year limited manufacturer's warranty. Imported.