Be prepared for the unexpected with the SOL Emergency Bivvy with Rescue  Whistle and Tinder Cord. The lightest emergency bivvy on the market,  weighing a mere 3.5 oz. and packing down smaller than a 12 oz. soda can.  The waterproof, windproof material reflects 90% of body heat  while sealed seams keep out rain, wind, and snow. Start a fire with the  tinder cord included on the stuff sack. The bright orange is highly visible, and the rescue whistle signals for help. Use the SOL  Emergency Bivvy as a sleeping bag or a blanket to ensure you stay warm  until help arrives.