The phot r 3m adhesive floating backdoor mount for gopro hero attaches directly to the housing backdoor to keep your gopro afloat great for all deep water activities comes with an extra backdoor for your gopro dive housing easy to spot flotation attaches directly to the housing backdoor great for snorkeling surfing wakeboarding or other deep water activity please notethe floaty backdoor will not support the weight of the suction cup mount or the additional weight of bacpactrade ac