If your knee is weak, swollen, painful or recovering from an injury, Bauerfeinds GenuTrain A3 knee support provides relief and stability for the knee joint. GenuTrain A3? s medical-grade compression relieves pain, heightens proprioceptive bio-feedback, and protects the joint without limiting your mobility. More than 80 years ago, Bauerfeind set the bar for compression technology and weve been raising it ever since. Because of our medical heritage and attention to detail, our products still lead the industry in fit, comfort, support and performance. Endorsed by the Arthritis Foundation, NBATA (National Basketball Athletic Trainers Association), and PBATS (Professional Baseball Athletic Trainers Society), and the 2008-2016 Olympic Games, Bauerfeinds GenuTrain knee support is trusted by professional athletes and healthcare providers throughout the world. Whether you are a serious athlete or an active person who doesnt want pain or injury to interfere with the things you love to do, Bauerfeinds GenuTrain A3 knee support is for you. Be comfortable and active with GenuTrain. Bauerfeind Perfect Fit sizing system - Please measure according to the size chart provided. If you are in between sizes, you should typically go with your thigh size.