This unique roll-top backpack—made of PVC-free 600D PU-coated polyester and scrim-reinforced urethane—provides watertight protection around town and on the trail. It includes an innovative QuickClip closure for easy, one-handed fastening/unfastening, as well as our Modular Accessory Pocket system for attaching add-ons, such as a Zip Pocket™ or Mobile Electronic Case™ . Other key features include breathable, ergonomic shoulder straps that combine with a sternum strap and hideaway waist belt for a comfortable, supportive fit; a breathable, waterproof back panel; and an external pocket and carry handle.