Survive Outdoors Longer Thermal Bivvy with Rescue Whistle

Fully windproof and water resistant, the Thermal Bivvy provides extreme warmth and protection with a metallized coating that reflects 80% of body heat, preventing heat loss by trapping warm air against your body while keeping the elements out. This durable bivvy includes a tinder cord drawstring for emergency fire starting with a built-in rescue whistle. Includes an adjustable footbox and hook and loop closures.