DonJoy Lateral J knee brace. Provides patella support. Comfortable and durable. Brand DonJoy Like New, outside return window Size Large (Pack of 1) Fits thigh circumference 21-23.5 in Calf circumference 16-18 in Fit tip-take the measurement of your thigh and calf 6 inch above and below your kneecap using a flexible type tape measure. Specific Uses For Product Patella,Knee Support Age Range: Adult Material: Nylon, Neoprene Ideal for day-to-day activities and while playing sports; both in and out of the water Choose the knee brace to best suit your needs, between Drytex and neoprene; and with or without aluminum hinges for added stability Drytex allows for improved airflow and is preferred by individuals in warm weather climates and those with neoprene allergies or irritations. Health Concern: Bone & Joint Health Neoprene is a thicker, wetsuit-like material that provides a warmer option.For patients with knee pain related to the following: lateral patellar subluxation and dislocations, lateral patellofemoral malalignment, patellofemoral maltracking and pain, and chondromalacia due to lateral maltracking Universal design allows the DonJoy Lateral J Patella Knee Brace to be used by both men and women.