The use of high-strength U-steel buckle, with threaded steel bolts, exceptionally strong, for the necessary emergency escape or other circumstances to provide security. The use of strong plastic fasteners (backpacks used fasteners). Bracelet length of about 20cm, plus steel buckle total length about 22cm, 7-core umbrella rope weaving, demolition after the total length of about 3.5m. This product is pure hand-woven, can be quickly disassembled (after disassembly to be woven to restore Oh!). When necessary can be opened as a piece of rope (4 mm diameter, single rope tension in 260 kg), monochrome bracelet Open the umbrella rope length about 3 meters.