Features: This golf swing arm band helps you understand how arm and body move to strengthen your muscle memory. Make of fine fabric with excellent elasticity. It extends easily with the thick and strength of your arm and retracts quickly after stretching. Effectively coordinate your body and arm. Help improve your swing skills and find the correct hitting point as quickly as possible. Easy to Use: Put the elastic band on the 2 upper arm just above the elbows to keep the postures. Suitable for right handed and left handed golfers, as well as female golfers and junior golfers. Specifications: Component: Elastic strap Size: about 7x39cm/2.76x15.35inch Color: Blue/Black Package Includes: 1pc Elastic Golf Swing Trainer Arm Band note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.