Nylon Imported Retain Body Heat: This heat-reflective SOL emergency bivvy traps 90% of body warmth, adding to your survival supplies for the great outdoors or emergency survival kit Ultra Lightweight: At less than 4 oz and as compact as a soda can, the SOL emergency bivvy sack slips into any emergency kit or hiking gear with ease Weatherproof Protection: As part of your emergency disaster preparedness kit, this waterproof bivvy sack measures 36 x 84 inches and is a durable shield against rain, wind, and snow Rescue Ready: Equipped with a survival whistle and tinder paracord drawstring, this bivvy is a pivotal piece of survival gear in your emergency kit Rugged Fabric: The SOL emergency bivvy is made from ultra-quiet, tear-resistant material, ensuring it stands up to punctures without fail