Turn to the Survive Outdoors Longer Emergency Bivvy XL for an unexpected night outdoors. Hop in this emergency shelter and improve your odds of survival when you and a partner are forced to spend an unexpected night outdoors. Made from tear-resistant polyethylene, this bivvy reflects 90% of body heat back to you, keeping you warm. Stay dry with sealed seam edges, with full protection from rain, wind, and snow. Pack up the bivvy in the included stuff sack for compact storage in a pocket or backpack. Each pack includes a 4.9-ounce emergency bivvy.