Simply fill the Chillow?Cooling Pad with water and the uniquely designed pad will absorb body heat and provide soothing, cooling comfort. Use it with your pillow to relieve hot flashes, night sweats, migraines and sore necks. Or place it under your back, legs or feet to help ease aches and pains. For extra cooling, place it in the refrigerator for up to 30 minutes. No electricity or batteries required. Non-toxic, non-gel, latex-free. Plastic. 21"H x 12"W.