ComforPedic Loft from Beautyrest revolutionary Memory Foam infused with cool, rejuvenating gel in a dual-sided design provides the ultimate supportive and comfortable sleep experience. Gel absorbs pressure and channels heat away, preventing excessive heat build-up that causes sleep disturbances. 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.