Gopromate(TM) Wavy Glue Elastic Adjustable Head Strap Mount Belt with Anti-slide Glue For GoPro Hero 1 Hero 2 Hero 3 Head strap is made of elastic nylon which is more durable. Anti-skid design, making it more convenient. Wavy glue on the back of the strap helps to prevent sliding off when doing strong sports Adjustable and compact design, meeting different requirements of the users. Compatible with Gopro Hero 1 Hero 2 Hero 3.