Temperature Regulating Pillow - Premium NASA-approved Outlast fabric on both sides fights off heat Made in the USA No Harmful Substances or Chemical - Oeko-Tex Standard 100 Certified Technology Manage Heat - Designed to manage heat through your pillowcase Easy to Care For - Just throw it in your home washing machine Flip to the cool side. Oh wait, they're both cool. The UltraCool Pillow takes the technology from our temperature-regulating bedding and incorporates it into a pillow. Our premium fabric designed for NASA, paired with Polysilk down-alternative fiberfill, delivers the most comfortable place you'll rest your head.