In the event youre forced to spend an unexpected night outside in cold temperatures, put the odds of survival in your favor with this Emergency Bivvy. Made from the same material as Adventure Medical Kits renowned emergency blankets, this Bivvy reflects 90% of your own body heat back to you. The fully sealed design prevents snow and rain from getting inside, and the XL size can hold two people. Rolls into a tiny 6.3 oz. package. 84 x 60 un rolled. Sealed on the sides for full protection from rain, wind, and snow. HeatsheetsAR material is waterproof and windproof. Reflects 90% of radiated body heat. Big enough for two people.