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 percent 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.