Relieve Knee Pain Caused by Jumper’s Knee (Patellar Tendinitis), With One Light, Comfortable Patellar Sleeve Targeted Conditions: ArthritisRunners KneeJumpers KneePatellar Tendonitis Performance Features: Medical Grade SupportAdvanced medical device for Patellar Tendonitis, knee pain and swellingPatented Compression Zone Technology®Seamless ConstructionMoisture wicking, extra durable & soft nylonWear during walking or exercising for extra protectionSupports and stabilizes the patellaSupports muscle stability and improves circulationCare Instructions: Hand wash with mild soap and air dry. No bleach or fabric softener. Comes with one (1) compression patellar tendon sleeve per package. Use this size chart for accurate fit. Size Below Patella Circumference S 9-13 in 23-33 cm M 11-15 in 28-40 cm L 13-17 in 33-45 cm