DragonPad&reg; Head Strap Mount Belt for GoPro Hero 3+ 3 2 1 with Anti-slide Glue Soft rubber pad inside the back provides you comfortable wear. Wavy glue on the back of the strap helps to prevent sliding off when doing strong sports. Adjustable design fits for different requirements of the users. Keep your GoPro camera on your head more stable. Head strap is made of elastic nylon which is more durable.