Available in three sizes with interchangeable hipbelt and shoulder strap options to assure a precise, personalized fit Proprietary 210D Hadron™ LCP (Liquid Crystal Polymer) grid pack fabric is incredibly light and exceptionally durable FC0 DWR (Durable Water Repellent) finish repels moisture and is PFAS-free Interchangeable hipbelt and shoulder harness systems are available in two sizes for a precise fit Highly breathable shoulder harness has two zippered pockets that accommodate 500mL soft flasks or devices Patent-pending two-point harness system adjusts at top and bottom for optimal pocket positioning and fit Supportive, highly breathable monofilament mesh hipbelt has adjustments at the front and back to fine-tune the fit Accessible, easy-to-use roll-top design adds up to 10L additional capacity 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 Reservoir-compatible main compartment with clip supports hydration systems Adjustable sternum strap for comfort and stability Two side pockets with fast closure system for easy access Dual attachment points secure trekking poles Front bungee compression system and webbing daisy chain provide external carry options Front top pocket and internal security pocket with key clip organize small essentials