Aluminum Alloy Support Strips: Three aluminum alloy strips are fixed, the left and right support strips go straight, and the lower support strips are arc-shaped to fit the arm. Movable Buckle : movable buckle , which can be adjusted comfortably according to the size of your hand. Tape Straps: Adjustable straps, the straps can be adjusted according to hand adaptation, the tape has strong stickiness and is more firm and convenient. Comfortable to Wear: Breathable and comfortable cloth , soft and skin-friendly, comfortable to wear. Comfortable Lining: The inner lining of the wristband is comfortable and elastic, suitable for different fat and thin people.