Dreamaire Outlast 350 Thread Count Bed Pillow has Outlast technology which responds to changes in temperature. It is uniquely engineered to help migrate the effects of hot flashes and overheating. It also has a warming effect if you are cold and releases heat. Create a complete temperature regulation sleep system with the Outlast bedding line. You will never be too hot or too cold again. You will always be "Just Right". The pillow is generously filled with polyester fiber fill (22 oz jumbo standard and 31 oz king) and is lined with the Outllast Certified Gold Liner. The pillow comes in jumbo standard and king sizes. The jumbo standard measures 20x28 inches and the king measures 20x36 inches