The Gibbon Magnetic Wrist Wizard from Rubytec is a survival wristband made from high-strength, super-strong Dyneema. It can be easily fastened around the wrist with its magnetic clasp. In an emergency, it can simply be unknotted and transformed into a rope. This bracelet is quick to put on, multifunctional and also stylish.Size S- Rope length disassembled: 320 cm - for wrist size: up to 195 mmSize M- Rope length disassembled: 330 cm - for wrist size: up to 205 mmSize L- Rope length disassembled: 340 cm - for wrist size: up to 215 mmSize XL- Rope length disassembled: 350 cm - for wrist size: up to 225 mm