SKU Gregory ARRIO 28 Material Main fabric: 210D nylon ripstop fabric, COD waterproof treatment, PFAS free. Bottom fabric: 420D 40% recycled nylon fabric, COD waterproof treatment, PFAS free. Lining fabric: 40% post-consumer recycled 135D polyester fabric, COD waterproof treatment, PFAS free. Hardware: Bluesign® certified fasteners. Comfortable foam: The shoulder straps, waist belt, and lumbar support are made of multi-density foam. Weight 940g Capacity 28L Load Range 11kg Highlights It provides flexible and stable support to accompany you during your exercise. VaporSpan tension backplate Engineering mesh fabric is used to ensure smooth airflow while providing support. Breathable shoulder straps Perforated foam and open mesh fabric enhance comfort and breathability. Designed for fast hiking Integrated safety whistle with chest strap and stabilizing belt. Water bag hose fixing clip. Storage and retrieval design A quick-access zip pocket at the top for secure storage of your belongings. Double elastic mesh pockets with an angled design for easy access. The space is large enough to accommodate water bottles of any size. Water bag compatible system Built-in water bag compartment. Equipped with SpeedClip water bladder hook. Compatible with Gregory's Hydro water bag (water bag sold separately). Trekking pole fixing system Equipped with elastic cord loops and lower webbing fastening device. Front reflective strip fixing ring. Front fabric storage bag with elastic mesh sides for easy external storage. Customized ComfortGrip molded zipper pulls and molded webbing retainers for easy shoulder strap management.