Targeted heat retention to help improve circulation. Trusted brand since 1918. Compression helps to reduce swelling in injured areas. Finished reinforced edges provide comfort and prevent rolling and slipping. Breathable knit material releases moisture. Soft, neoprene-blend panel stitched around the knee joint provides heat retention for soothing warmth. Elasto-Preene is an innovative combination of elastic and neoprene blend materials. The Ace Brand Elasto-Preene Knee Support is designed to provide you with the optimal support you need while assuring proper fit and comfort. Provides light compression, support and therapeutic heat retention th help relieve symptoms associated with minor sprains, strains and arthritis. Size Selection: Measure circumference around mid-section of knee joint. L/XL: 16-20 in (40.6-50.8 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. acebrand.com. Package is recyclable. Made in China for 3M.