Gregory Pack Nano 20 l is far from your basic backpack—it features a ventilated back panel and an expandable external pocket to ensure maximum convenience during trail hikes. Its 20-liter capacity can hold a surprising amount of gear and personal items, whether you're exploring a city, tackling mountain trails, or discovering remote corners during overseas vacations.   Features: Independent zippered pocket for hydration bladder with passage to shoulder straps or space for a tablet. Stretch mesh front pocket for extra space and gear organization with secure buckle closure. Padded air mesh shoulder straps with single-handed openable chest strap buckle and hydration tube pass rings. Die-cut breathable back panel and stowable waist belt. Large zippered access pocket to main compartment and dual compression straps with quick release buckles. Quick-access front zippered pocket, key hook, and organizer compartments. Dual side mesh pockets for water bottles and quick stash. Custom ComfortGrip printed zipper pulls. Reflective webbing loops for visibility and front attachment loop for torch. Materials: Body: 210D Honeycomb Cryptorip Nylon. Bottom: 420D high-density nylon. Shoulder Straps / Waist Belt / Lumbar Pad: Perforated CLPE Foam. Support Structure: Supportive CLPE Foam. Lining: 40% Post-consumer Recycled 135d Polyester with C0 DWR: designed without PFAS. Pack Hardware: Bluesign approved buckles. Gregory Pack Nano 20 l trekking backpack