Warmth and durability for any season! The SOL Thermal Bivvy's metalized non-woven fabric provides waterproof protection from the elements while reflecting 80% of your body's heat back to you. The SOL Thermal Bivvy offers more versatility than traditional emergency sleeping bags - the extremely durable fabric resists rips and tears, and thanks to its soft face and aggressive side-venting, it can be pushed into duty as a stand-alone sleep system in warmer weather of 50 F (10 C). Ideal for outdoor users looking for an emergency shelter that can become a regular part of their gear arsenal. The Bivvy measures 84 x 36 (213.4 x 91.4 cm), weighs 8.9 oz. (252.3 g), and is ideal for skiing, snowboarding, alpine and rock climbing, expeditions, adventure travel and emergency prep.