SJCAM Adjustable Helmet Starp

 ☆ 【Suitable for any action camera】Waterproof head-strap camera mount that works with any sport camera including SJCAM SJ4000SJ5000SJ6SJ7SJ8 Series etc. ☆ 【Rotatable 360 Degree】The strap rotatable mount could revolve 360 degree,shooting the appropriatest picture &video you want. ☆ 【Good material】Made of high quality PC & Nylon material which durable and touch comfortable, support flexible and extend. ☆ 【Perfect length】Measures 6 to 7 inches in diameter; stretches to 12 inches in diameter. One size fits all kind of head,helmet,hat directly. ☆ 【Skid resistance design】Increase the skid resistance material inside of the head strap,prevent the creep down from head.