Engineered with an even-pressure air cushion to relieve pain, the Shock Doctor(R) 828 Tennis Elbow Support Strap supports your elbow tendons for pain-free play. Support Your Performance Body mapping compression specifically targets the arm for improved muscle and joint support Air cushion for even pressure to relieve tendinitis pain Compression helps enhance overall blood circulation in the area of wear Aids in reducing strain and fatigue of muscles to accelerate recovery times Terry lined with Lycra binding for comfort and long lasting wear Easy-to-wrap, premium Z-Grip adjustable compression closure