Designed to provide comfortable, even compression. Learn more. Get the free app for your phone at Trusted brand since 1918. Anatomical shape for optimal fit and joint protection. Breathable, dual-stretch power knit materials for comfort. Comfort panel reduces bunching behind the heel. Fits comfortably in shoe. The Ace Knitted Ankle Support is designed to provide support to stiff, weak or injured ankles. Wear during activities which lead to discomfort. Provides light compression, support and therapeutic retention to help relieve symptoms associated with minor sprains, strains and arthritis. Size Selection: For left or right foot, measure around the heel and the instep. Large: 15 to 17-1/2 inches (38-44.5 cm). The Ace Trademark is your assurance of superior quality, support and comfort. 3M guarantees your complete satisfaction or your money back. Questions? 1-800-537-2191. Package in recyclable. Made in China for 3M.