The Escape™ Pro Bivvy evolutionary material provides dry, warm comfort you can trust. Engineered to be breathable, waterproof and heat reflective, the Escape™ Pro allows condensation to escape while keeping the elements locked out and the heat in. Use it as a protective barrier for your sleeping bag and add 15°F of warmth by reflecting 90% of your body's heat back to you. On evenings above 50°F, leave your sleeping bag at home and travel ultra-light. At only 8oz and with its compact design, its one little bivvy you can depend on!