OPTIMAL THICKNESS FOR SUPPORT, BREATHABILITY & COMFORTABLE SLEEP: Our 3-inch thick mattress topper offers optimum thickness and fits mattresses from 8 - 20 inches. The 300 thread count 100% cotton topper provides strong support and prevents back ache, unlike extra thick pads. Our mattress topper does nor retain heat and maintains optimal temperature. No more sweaty nights caused by memory foam pads or traditional mattresses SOFT MATTRESS TOPPER WITH DEEP POCKET FOR A PERFECT FIT: Stuffed with advanced 100% Polyester Fibers (Down Alternative) fill that has a soft and bouncy feel. Our square pillow top mattress pad adds a layer of protection, comfort and softness to your new mattress providing a hotel-like experience. It can also be used to refresh and support old spring mattresses.