Capacity: 40L; Please search B00MT7FY08 for 30L, Search B00MT7FXVI for 32L, and roll down to the page to the A+ description for more product features and detail
Lightweight water-resistant and nylon material; dimensions: 13.3 x 22.6 x 7.8 inches; Ergonomically designed airflow padded back panel to prevent overheating
Adjustable contoured padded shoulder straps and thicken lumbar support for comfort
Adjustable sternum strap, waist belt and internal frame enhances the stability
2 front zip pockets, 2 side zip pockets and 2 compartments with multiple interior pockets for organization; This backpack can fit hydration reservoir up to 3.0L, but didn't come with reservoir and tubing