FIT AND SIZING: With your knee slightly bent and taking the center of the kneecap as your starting point, measure your thigh circumference 5 1/2 inches above the kneecap mid-point and measure your calf circumference 4 3/4 inches below your kneecap mid-point. Refer to the sizing chart in the product images for a size to associate with these measurements. If your measurements are split between two sizes choose the thigh size. KNEE STABILIZATION DURING SPORTS ACTIVITIES: The Bauerfeind Sports Knee Support supports the movement of the knee during sporting activities through gentle, beneficial compression which alleviates the effects of overuse and high impact and protects against too much strain on the knee. TARGETED RELIEF: An anatomically contoured pad surrounds the kneecap. This special functional element disperses pressure. When the knee moves, the pad and the knitted fabric massage the connective tissue and the muscles. Two pressure points and lateral wings deliver targeted stimuli. This stimulation triggers positive sensory motor feedback. The stabilizing muscles are activated to improve joint stability. This stabilizing effect reduces stress and risk of injury. COMFORT AND FREEDOM OF MOVEMENT: The Air Knit fabric of the Sports Knee Support is lightweight, comfortable, moisture-wicking and washable. It is designed for maximum breathability and comfort. The Knee Brace is built for sporting activities such as basketball, football, soccer, baseball, running, lacrosse, tennis, weight training & more! 100% SATISFACTION GUARANTEED: With proper use and care, our products are designed to last. We stand behind everything we sell. If you are not satisfied with your purchase, you can return it for a replacement or refund within 30 days of purchase. One year warranty against manufacture defects included. MADE IN GERMANY with the highest quality standards.