PREMIUM COOLING GEL FABRIC: The cooling pillow is made of tailor-made cooling gel fabric that have undergone long-term research and upgrading. This side sleeper pillow can reduce your heat in few minutes. In summer, it will allow you to have a cool night, and a refreshing, comfortable dry morning without any stickiness! There's nothing better than having a cool night on a hot day! Right, huh? NOT JUST SOFT: Our unique shredded memory foam pillow is a revolutionary hybrid designed to provide you with the sweet feeling of down and the solid support of memory foam. The perfect balance will keep your spine in line so that can help you to relax your cervical spine. DOUBLE-SIDE DESIGNED: The COOLING side is made of our cooling gel fabric which is usually used in hot days. The BAMBOO side is made of bamboo fiber rayon that is a kind of breathable, supple, cozy material and suitable for some cold days. In short, our BETU bamboo pillow fits all seasons use, what you need to do is just turning it over when you feel hot or cold. One bed pillow for both purposes!