The Lifesystems Thermal Bag is windproof, waterproof and radar reflective.__ This durable survival bag is made from thermally welded strong metallised polyester with taped seams, to provide entire body coverage for maximum protection from low temperatures. __ When inside the bag, it will reflect and retain over 90% of your radiated body heat - essential if you are in an emergency situation.__ Weight: 180 g.Dimensions: 90 mm x 140 mm x 38 mm.Dimensions (unpacked): 210 cm x 100 cm.