The light & Dry Bivi Bag made from strong metalised LDPE & provides full body coverage from the elements when you are in a pickle. For use in emergencies to prevent the onset of hypothermia & to provide a safe shelter. The tough LDPE outer material is waterproof & windproof whilst the metalised interior reflects & retains over 90% of your radiated body heat. What makes this bag attractive to the mountain walker is the fact that it is re-useable & comes with its own little stuff sack. Windproof Waterproof Retains 90% of radiated body heat Made from metalised LDPE Comes with its own stuff sack