Features of the Gregory Men's Zulu 30L Pack Freefloat ventilated suspension featuring the 3D comfort Cradle hipbelt with dynamic flex panels that move with the natural movements of body Adjustable torso length with open-air ventilated backpanel with moisture wicking mesh 3D comfort Cradle hipbelt with 3D construction for hotspot free, body-hugging comfort Die-cut shoulder harness with sternum strap featuring integrated safety whistle and hydration clip Perimeter alloy frame and fiberglass anti-barreling cross-stay for stable load management Raincover included with dedicated zippered pocket behind front pocket for added organization Sunglass quickstow system on shoulder harness for quick, secure and scratch-free access to shades Main u-zip opening for open access to the main compartment Hydration sleeve with speedclip hydration hangar compatible with gregory's 3D hydro reservoir (reservoir not included) Top zippered pocket with reflective attachment points, key clip, and internal zippered security pocket Dual side stretch mesh pockets with pass-through for over or under compression Front stretch mesh pocket with secure buckle closure Adjustable attachment loop and Upper shock lock for trekking poles or an ice axe Custom comfort-grip molded zipper pulls and molded webbing keepers for strap management Fabric Details External Material: 100% Nylon Frame Materials: 4mm Alloy steel and fiberglass anti-barreling stay and Hdpe Pack Body: 210D Honeycomb cryptorip hd nylon, 210D High tenacity nylon Pack Bottom: 420D High Density nylon, 135D High Density polyester Lining: 135D High Density embossed polyester Suspension: Dual-Density lifespan EVA foam