The My Cool Comfort pillow is the result of countless hours of research in innovative pillow technology. Our pillow uses a proprietary Ice Silk technology on one side, that breathes and stays cool all night long. While on the other side, there is an ultra soft and cozy Bamboo fiber material that will keep you warm on those cooler nights. As with anything in life, we know that a one-size-fits-all approach is never a good one, so we've made our pillow 100% adjustable. Just add or remove our breathable, tri-density, memory foam filling until you've reached the perfect level of comfort for you. So no matter which way you sleep, your satisfaction is guaranteed. Soft, medium, firm, or the infinite options in between, you'll never wake up to fluff, fold, or flip EVER AGAIN!