Lifesaving seven core umbrella rope bracelet with whistle and bottle opener, with outer polyester, nylon lining seven core. Outdoor Survival Bracelet Reliable Camping Life-saving Rope Bracelet for Outdoor Activities. Multi-function. This bracelet can be quickly disassembled when you need a rope in emergency escape, up to 3 meters of the life-saving rope, single rope tension in 220 kilograms. Be suitable for daily wearing, especially, necessary for outdoor activities, critical moment will come in handy.