An Ergonomic Pillow With 3-Layer Structure That Can Be Adapted In Height And Comfort Depending On Your Sleeping Preferences. With All Three Foam Layers, You Get A High Pillow That Is Ideal For Back And Side Sleepers. Remove The Mid-Layer To Make The Pillow Lower And Comfier For Stomach Sleepers. Cooling Gel Layer And Cooling Fabric On One Side Provide A Soothing Sleep Surface. Soft, Non-Cooling Check-Pattern Fabric On The Other Side. Flip To The Side That Suits You Best.