Withstands quick submersions and will float if dropped in the water. Earth-friendlier PVC-free materialsOur highest level of durability and a lighter weight result in the premium performance of this eco-friendlier version of our popular Boundary Pack. It features our classic, watertight Dry Seal roll-top closure and is made of a PVC-free, scrim-reinforced urethane providing our highest level of abrasion resistance while treading lightly on the planet. A lightweight suspension system includes waterproof and ventilated shoulder straps, as well as a waist belt on every size. Available in three sizes: The 115L and 70L sizes close with side-cinch buckles, while the daypack-size 35L includes a top buckle closure.