The Escape Bivvy has a full hood, draw cord closure, 23 inch side zipper, and a fully formed foot box. The material is breathable, and therefore will have less condensation formation than a standard emergency blanket. The escape Bivvy weighs in at 8.5 ounces, and the Thermal Bivvy at 8.9 ounces. The Escape Bivvy reflects 70% of body heat, and the Thermal Bivvy reflects 80%. The Thermal Bivvy has no hood, a 32 inch Velcro side opening, and Velcro foot vent.