-Thermo-Lite non-woven polyester
-Reflects up to 80% of radiated body heat
-Waterproof and windproof
-Ultralight, warm weather sleep system to 50°F
-Included stuff sack allows you to store the bivvy before or after use
Mutli-functional, year round bivvy sack is ideal as a light weight replacement for your sleeping bag when temperatures are above 50F/9C and an excellent emergency survival shelter for winter time activites. Reflects up to 80% of radiated body heat. Thermo-Lite non-woven fabric is waterproof and windproof.