This is a slim compact backpack. It's great for hiking, fishing, climbing, running, bicycling, biking, extreme sports. Size in CM: 14cm (L) x 42cm (H) x 21cm (W). Size in inches: 4" (L) x 17.7" (H) x 9" (W). Capacity: 26-28 Liters. Made of rugged synthetic high quality material: Oxford 800D. Mesh Padded back panel with built-in ventilation channels for the most demanding application. Deluxe features throughout. Adjustable shoulder straps. Hydration bladder compatible. Mesh breathable back.