I demonstrate these bivvy bags in each of my wilderness survival classes. Our students are always amazed at how quickly they become warm once they are inside. The SOL Thermal Bivvy is small and light enough that you will not hesitate to take it along on an outing and strong enough to survive some pretty tough use. I personally carry one in each of my vehicles and another in my day pack. A great product and a "must have" for the adventurer.
Adventure Medical Kits Sales Rep and Professional Adventure Racer Kyle Peter shows you the Survive Outdoors Longer Thermal Bivvy, an emergency shelter made from a more durable and comfortable material than the Survive Outdoors Longer Emergency Bivvy.