The Natracure Cold Therapy Socks are socks designed for use by individuals with foot and heel pain or foot disabilities. The socks are designed to relieve pain from heel spurs, plantar fasciitis, toe problems, tendonitis, and Haglund's Deformity. These therapy socks feature removable gel packets that provide targeted cold therapy. Built-in pockets the keep chilled or frozen gel packs on top, bottom, or heel of foot. SIZES: Small, medium, large, and extra large.