Support level 1. designed to provide comfortable, even compression. Trusted brand since 1918. Anatomical shape for optimal fit. Breathable, dual-stretch power knit materials for comfort. Fits comfortably in shoe. Comfort panel reduces bunching behind the heel. The ACE Brand Compression Knee Support is designed to provide support to stiff, weak or injured knees. Wear during activities which lead to discomfort. Support Level 1: Provides light compression, support and therapeutic heat 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. Size: S/M; In: 10-15; CM: 25.4-38. Size: L/XL; In: 15-17-1/2; Cm: 38-44.5. Support Level: Provides light compression, support and therapeutic heat retention to help relieve symptoms associated with minor sprains, strains and arthritis. Acebrand.com. Questions? 1-800-537-2191. Acebrand.com. Package is recyclable. Made in China for 3M.