In step with Ospreys goal to become the most progressive, transparent and sustainable hardgoods brand in the world, the packs feature high quality Bluesign®-approved body fabrics and PFC-free DWR. Additionally, the injection molding on the AirScapesuspension virtually eliminates plastic waste. With highly proficient suspension and a selection of larger volume styles, the modular Aether Plus and womens specific fit Ariel Plus series offers impressive carrying ability to support the heaviest of loads. A full range of features like a DayLiddaypack, Stow-on-the-Go trekking pole attachment and reliable, hightenacity durable nylon fabrics make life on the trail easier.Features:420HD Bluesign® nylon External hydration access Top lid pocket Sleeping pad strapsSide compression straps Dual axe/pole attachmentsS/M - 55L, 2.19kgL/XL - 58L, 2.21kg