When every ounce matters but you still need a backpack that's more than just a sack with shoulder straps, the Exos makes for an excellent ultralight companion. The Exos 58, made with 100% recycled materials, is perfect for those more committing trips when resupply is few and far between. Highly experienced backpackers will appreciate industry-leading comfort and ventilationwithout the weight it often addsmaking it the perfect pack for committing through-hikes and ultralights. Need to slim things down even further? Remove the floating lid and use the integrated FlapJacket to protect your gear inside. Plus, Ospreys refined AirSpeed suspension keeps you cool with maximum airflow between you and your pack, so each mile stays as comfortable as the last.   Top pocket web loop attachment points Removable floating lid with top and under-lid zipped pockets Integrated FlapJacket cover for lidless use Internal hydration sleeve with center back hose port Front stretch mesh pocket for stashing ge