1. Balances head pressure and effectively reduces gravity 2. 180 degrees of rapid expansion and contraction adjustment, convenient and easy to adjust the top position when using, clockwise tightening, counterclockwise loosening 3. Adjustable elasticity, close to the head, soft silicone, comfortable to wear 4. Convenient snap design, can be quickly installed and disassembled, easy to use 5. Material: ABS, silicone 6. Weight: about 134g 7. Description: only the headband, does not contain other
