Room Essentials Foam Mattress Topper - Blue - Twin XL The Room Essentials Comfy Foam Mattress Topper offers an easy way to add a layer of comfort and warmth to your bed. Its textured surface is designed to relieve stress, tension and pressure points while you sleep. Provides five zones of customized support and comfort Dimensions: 78.5" L x 37.5" W x 1.5" Thick - 100% polyurethane Textured surface - Sturdy construction - Gel-infused foam Hypoallergenic - Machine washable