Available in two 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 harness system is available in two sizes for a precise fit across a wide range of body types Highly breathable AeroForm back panel and anti-barreling frame sheet enhance carrying comfort Reservoir-compatible main compartment with clip and tube port supports hydration systems 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 Adjustable dual-point sternum strap and removable waist belt for comfort and stability Two side pockets with fast closure system for easy access Dual attachment points secure trekking poles Quick-adjust front bungee compression system and webbing daisy chain provide external carry options Top pocket and internal security pocket with key clip organize small essentials