Aerus natural memory foam 1-inch mattress topper gives luxury and comfort without the body heat retention. Bedding is naturally antimicrobial. Mattress topper has open cell construction for a cooler night s sleep. Aerus open cell technology allows air to flow through and release the warm air. Dissipates heat 10 times faster than traditional memory foam. Measures 1 inch thick. High density 4-pound open cell breathable memory foam. Temperature neutral memory foam so room temperature will not make it change firmness. Hypoallergenic anti-microbial temperature-sensitive foam promotes a healthy night s sleep. Topper never needs turning . Dimensions:. Twin: 37 inches wide x 71 inch long x 1 inch thick. Twin XL: 37 inches wide x 77 inches long x 1 inch thick. Full: 51 inches wide x 71 inch long x 1 inch thick. Queen: 58 inches wide x 77 inches long x 1 inch thick. King: 76 inches wide x 77 inches long x 1 inch thick. Cal King: 70 inches wide x 80 inches long x 1 inch thick . . Memory Foam Do s and Don ts:. . To maximize memory foam expansion; remove from packaging within 72 hours of receipt.. This product arrives very tightly packed. Please unwrap and allow 48 hours for this product to return to its original shape.. Being sealed in plastic packaging sometimes traps odors. A few hours of airing usually removes the odor. . Due to machine cutting manufacturing processes there may be slight variances in the dimensions of this product.. Due to the nature of Memory Foam the firmness level of every item is unique.. Please be advised that even similar products may produce different firmness results.