Great Choice for POV/VLOGThe phone can be placed horizontally and vertically,The design of J-Hook and long screw can make the phone rotate 90, The size of this strap is easily adjustable,fit over even the largest winter jackets,fit to wide range body size.Quick ReleaseThe smart phone chest strap mount with J-HOOK can be easily install and remove your phone,which can be disassembled in even one second.It is very convenient. Stable StructureThere are two non-slip rubber pads at the bottom and top of the phone holder;When you use the mini wrench provided to fasten the long screw to the J-hook mount,The mobile phone clip will be in accordance with your adjusted angle, stable shooting, will not slide. Multi PurposeSuitable for mountain biking, skiing, snowboarding, motocross, paddle sports, cliff diving wake boarding and other action sports,not intended for running or high-impact activities.