Simmons Beautyrest Comforpedic Loft from Beautyrest 4-inch Sculpted Gel Memory Foam Topper with Waterproof Cover Blue Twin Measures 4 inches thick Density: 3.2 pounds Draws uncomfortable warm air away from your body Offers moisture control preventing fluids from penetrating the surface of the mattress topper Queen: 59 inches wide x 79 inches long