Customize how your hike feels with the Aerios 35 Backpack. Its patent-pending interchangeable harness system - with three sizes of hipbelts and shoulder strap options - allows you to personalize your fit, so weight is evenly distributed through your hips and shoulders. Plus, the lightweight, durable grid pack fabric sheds light rain and stands up to all the drops, drags, and snags a pack encounters on the trail. What&';s been updated: Updated with a FC0 DWR finish for a lower footprint. Features & Specs Technical features Lightweight Durable Water repellent Construction Proprietary HadronA(R) LCP (Liquid Crystal Polymer) grid face fabric is incredibly light and exceptionally durable with abrasion resistance rivalling fabrics twice its weight Fabric treatment FC0 DWR (Durable Water Repellent) finish repels moisture and is PFAS-free Logos & Label configuration Arc&';teryx word logo Arc&';teryx Bird logo Pack attachment configuration Two trekking pole attachment points Pack compression strap configuration Front bungee compression system and webbing daisy chain provide external carry options Pack dimensions Length: 54cm, Width: 28.5cm, Depth: 24cm, Volume: 36L Pack hydration Reservoir bladder compatible inside of main compartment Pack loading & Closure configuration Accessible, easy-to-use roll-top design adds up to 10L additional capacity Pack pocket configuration Internal security pocket with key clip Top pocket Two side pockets Highly breathable shoulder harness with two zippered pockets that accommodate 500mL soft flasks or devices Pack suspension configuration Adjustable sternum strap Interchangeable harness system available in two sizes for a precise fit across a wide range of body types Patent-pending two-point harness adjustment system works at top and bottom for optimal pocket positioning and fit Supportive, highly breathable monofilament mesh hipbelt has adjustments front and back to fine-tune the fit SRT size: Shipped with small hipbelts and shoulder straps REG/TALL sizes: Shipped with large hipbelts and shoulder straps Highly breathable AeroForm back panel and anti-barreling frame sheet enhance carrying comfort Removable 7000 series aluminum stay helps support the pack for comfort and balance Sustainability Contains materials that meet the bluesignA(R) criteria Primary fabric - bluesignA(R) approved material Secondary fabric - bluesignA(R) approved material Lining - bluesignA(R) approved material PFAS (Per- and polyfluoroalkyl substances) Compliant Size SRT, REG, TALL Weight 1.16kg / 2 lb 8.9 oz Activity Hike Model X000009588 Manufacturing facility Dong-In Entech Vina Co. LTD, Vietnam