When you get thirsty on your trek, reach for your water bottle insulated in this Outdoor Research bottle carrier. Perfect for hot or cold liquids, it features a molded EVA foam lid and base and has a hook and loop attachment strap that allows it 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 0.5 liter Nalgene, CamelBak, and Cyclone bottles.