Twin Size HPU04TP02T 39" wide x 74" long x 2" high Full Size HPU04TP02F 54" wide x 74" long x 2" high Queen Size HPU04TP02Q 60" wide x 80" long x 2" high King Size HPU04TP02K 76" wide x 80" long x 2" high 4" 2 LAYER I-GEL FOAM TOPPER This topper has ventilated memory foam with air holes, I-Gel infused foam The punctured holes are for air flow to maintain the dry condition of the topper and to provide the most healthy sleeping environment I-Gel Infused foam is a performance material to lower temperature infused gel particles in the memory foam The topper has a dual cover and zipper system Inner Cover is made out of Cheese cloth Outer cover is washable and is made out of low denier high density soft poly Density of topper is 2.5 and weight is: Twin is 6 Kg, Full is 9 kg, Queen is 11 kg and King is 15 kg