Be prepared for the unexpected with the SOL Emergency Bivvy XL with Rescue Whistle and Tinder Cord. The extra-large bivvy design with a closed toebox helps keep warm air inside with enough space to shelter two people. 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 XL as a sleeping bag or a blanket to ensure you stay warm until help arrives.