Experience the ultimate Sleepclimate down alternative pillow with 37.5 technology. 37.5 Technology is a natural technology that incorporates sustainability throughout the product lifecycle. The technology helps your body naturally thermoregulate to cool you when you are hot and keep you warm when you are cold. The 300 thread count 80% cotton and 20% enhanced 37.5 fiber fabric provides a soft and smooth touch filled with 20% enhanced 37.5 fiber and 80% down alternative polyester. Featuring 2-inch gusseted sidewall with double stitched grey piping, this pillow is perfect for all back and side sleeper. Available in two sizes and offers the loft and support of comfort. Dimensions: Disclaimers & Disclosures: Down and feather-filled products are packaged tightly for shipping. Upon receipt, remove this item from its packaging, fluff gently, and allow several hours for full loft recovery. In addition, products sealed in plastic packaging sometimes have a disagreeable scent because of concentrated natural fibers. A few hours of airing typically removes the odor.