Size: Small Fits a 15 -17 Leg Circumference Measure 4 above center of knee cap. Unlike traditional compression garments the IMAK Compression Arthritis Knee Sleeve is designed with all-day comfort in mind. This makes it the ideal choice for people living with chronic pain from arthritis fibromyalgia overuse or other conditions. The Sleeve provides mild compression for warmth and helps increase circulation which ultimately reduces pain and promotes healing. Made of soft breathable cotton material it is comfortable enough to wear all day and night. Tri-band technology holds sleeve securely in place and helps prevent rolling. Effective non-invasive arthritis relief. Provides mild compression to help control or decrease swelling of the joints. Cotton material allows skin to breathe and keeps hands dry. Comfortable to use all day and night.