This Sertapedic Cool Nites pillow is great for those looking for a cooler, more comfortable night's sleep with firm support. The cool to the touch surface absorbs and releases heat for instant cool comfort, keeping you cooler through the night. The hypoallergenic fiber fill provides lasting support and comfort. These fluffy, firm pillows are ideal for side and back sleepers, but can also be used by stomach sleepers who prefer firm support. The 300 thread count, 55 percent cotton 45 percent polyester cover surrounds a hypoallergenic, 100 percent polyester fill so you can breathe easy.