Pick your side, any side. This Cool Comfort Pillow has been designed with a layer of gel on one side and memory foam on the other side. The gel overlay and air holes throughout the entire pillow provide maximum comfort and ventilation creating that refreshing cold-side feeling. This classic pillow design is recommended for side, back and stomach sleepers. The solid memory foam core, cool gel layer and pin core holes provide the necessary support needed for a cooler-restorative night's sleep