The McDavid NRG Spring Hinge Knee Brace is best for moderate to major joint instabilities, recovery from sprains and strains, reducing fatigue, and post-surgical joint protection and rehabilitation. Spring Hinge Joint Assist technology helps relieve tension and stress on muscles and knee joint, reducing stress on knees up to 25%*. NRG helps reduce fatigue during activity, aiding in knee recovery. Integrated non-stretch adjustable straps ensure personalized fit. *Based on wearing one NRG brace per knee (equivalent up to 12.5% per knee). HELPS RELIEVE TENSION AND STRESS ON MUSCLES AND KNEE JOINT: Bi-lateral spring hinges offload stress from muscles and knee joint to speed injury recovery and reduce fatigue during activity, while providing lateral and medial support. REDUCES FATIGUE DURING ACTIVITY: Reduces stress on knees up to 25%* *Based on wearing one NRG brace per knee (equivalent up to 12.5% per knee). IMPROVED STABILITY AND MEDIAL AND LATERAL SUPPORT: Spring hinge is 60% lighter than traditional metal hinge** **Compared to hinge in McDavid 429 Knee Brace with Polycentric Hinges. ADJUSTABLE STRAPS FOR CUSTOM FIT: Engineered top and bottom 360º stretch with integrated non-stretch adjustable straps to ensure personalized fit. BUTTRESS FOR PATELLA SUPPORT: Open 360º padded buttress isolates and supports the patella. ALL AROUND COMFORT: Perforated back panel provides heat and moisture management and all-around comfort. IDEAL FOR ANY SPORT, ACTIVITY: Perfect for walking, running, hiking, soccer, biking, basketball, football, baseball, volleyball and more. FITS LEFT OR RIGHT KNEE UNISEX CONTENT: 48% SBR, 12% CR, 12% Polyester, 11% Nylon, 10% POM, 5% Rubber, 3% PU - NOT MADE WITH NATURAL RUBBER LATEX PATENT PENDING