Fit for GoPro HERO 8/7/6/5/4/3+/3/2/1,SJCAM sj7 star SJ6 legend M20 SJ9000 SJ8000 SJ7000 SJ6000 SJ6000 SJ4000 SJ6000 SJ...,Xiaoyi,Xiaomi Yi II 4K EKEN H9 H9R H8R SOOCOO C3… Adjustable chest belt, comfortable fit. It is perfect for skiing, mou Weight: 157g Chest strap elastic bandwidth: 25mm/38mm (adjustable)Bust length maximum elasticity: 125cm