JMT 1 Pcs OEM Simple Helmet Head Strap Belt Mount Camera Fixed Headband Adjustable Anti-skid for Gopro Hero 3 2 Hd OEM Simple Helmet Head Strap Belt Mount Camera Fixed Headband Adjustable Anti-Skid for Hero 3 2 HD Elastic Adjustable Head Strap For GoPro Hero 3/2/1, black Simple,Anti-Skid Version for SJ4000