Gregory Pack Arrio 30 l, featuring the ventilated FreeSpan back panel and breathable shoulder straps, is perfect for an afternoon hike or a full day of summit approach. Carry all your personal items (and more) with ample space and intuitive organization.   Features: FreeSpan suspended mesh back panel keeps your back dry and cool while walking. Top-loading access with secure drawstring closure. Breathable perforated shoulder straps with integrated hydration tube path and chest strap with integrated safety whistle. Included rain cover stored in a hidden pocket. Internal hydration sleeve with SpeedClip hydration attachment compatible with our quick-drying 3D Hydro reservoir (reservoir not included). Front buckle closure with reflective attachment loops. Hidden front vertical zipper pocket. Quick-access top zippered pocket. Swinging side zipper pocket for quick stow and key clip. Stretch mesh side pocket. Padded hipbelt wings with removable fabric. Custom ComfortGrip printed zipper pulls. Adjustable upper shock cord and attachment loop for trekking poles or ice axe. Materials: Body: 210D Honeycomb Cryptorip HD Nylon with C0 DWR (PFAS-free). Bottom: 420D High Density Nylon with C0 DWR (PFAS-free). Support structure: Alloy Perimeter Frame. Lining: 40% Post-consumer Recycled 135d Polyester with C0 DWR (PFAS-free). Pack Hardware: Bluesign approved buckles. Gregory Pack Arrio 30 l trekking backpack