The Outdoor ResearchWater Bottle Parka insulated bottle carrier lets you transport hot or cold liquids in the backcountry. It weighs much less than a thermos, but offers similar performance. A reinforced nylon strap with a hook loop closure allows this insulated carrier to ride on any pack. Water resistant, coated nylon fabric. Polyester knit lining. Closed cell foam insulation. EVA molded foam lid and base. Water resistant coated zippers. Reinforced nylon webbing with hookloop attachment. Fits Nalgene .5L, Klean Kanteen 27 oz., CamelBak .5L, Sigg .6L, Cyclone .5L. Weight: 5 oz.