Proprietary 210D Hadron LCP (Liquid Crystal Polymer) grid pack fabric is incredibly light and exceptionally durable | Interchangeable harness system 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 with two zippered pockets that accommodate 500mL soft flasks or devices | Patent-pending two-point harness adjustment system works 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