Jolly Gear Knee Brace Support Open Patella Stabilizer for ACL Arthritis and Sports Responds to joint swelling with adjustable straps: JollyGear Knee Brace gives moderate compression to knee swelling. Adjust straps as swelling decreases Relieves Pain: With its Patellar Stabilizer Design, the patella follows the correct movement to prevent further injury Overall Stability: JG Knee Brace also supports ACL, PCL, MCL, and PCL throughout the whole knee motion for running, walking, exercising and other activities Allow Patellar Movement while Compressing the Knee: It's Open Patellar Design allows patellar movement while still giving knee stability Prolonged Muscle Relaxation: Heat-retaining material promotes muscle relaxation and blood circulation around the knee