The Dromlite is the lightweight version of MSRs legendary Dromedary water bladders. The Dromlite is, as the name suggests, a lighter version but still features a tough 200 denier Cordura outer fabric for durability. The laminate construction features a BPA food grade polyurethane lining which is freeze resistant & can cope with being scrunched up & folded. The beauty of this type of water bag is that it can be rolled up & to take up less space when empty. Filling is made easy by the ergonomic low profile handle that swivels around the cap so you can fill up from any angle. Simply flip up the drinking spout to release a steady flow of liquid for rapid hydration.