WINDAUD Arm Sleeves for Man and Women - Compression and Comfortable Wear Anywhere for Sports Activity Compressibility and elasticity - It has both compressibility and elasticity from an optimal combination of compressibility and highly-elastic nylon and polyurethane and it is designed to protect your arms. Design - With a three-dimensional seamless design, dynamic movements and comfortable activities are possible, and it is designed to be used for all kinds of sports and outdoor activities. Outstanding restorability - By using and applying premium fabrics, continuous and long-term use is possible, and the outstanding restorability, despite repetitive usage, prolongs the lifespan of the product. Size - It is a one-size fit product and with its high elasticity, it is available from small(9") size all the way up to large(13") size. Garantee - The quality of products and satisfaction of our customers is our top main priority. And there are no worries because we continuously evaluate and check the quality of our products. If the customer is not satisfied with the product, 100% refund is guaranteed for 30 days.