- Compact and lightweight with minimalist design perfect for running, hiking, walking, cycling, climbing camping, fishing, skiing, training, family trips and many more… - Made of durable polyester with mesh panel, padded and breathable shoulder straps offer cushioning comfort to prevent easy wear and tear. - Unisex Backpack that will fit a men, women, teens of all sizes. - 2L Removable Hydration Bladder Bag - Designed to fit snug to your body with wide webbed adjustable shoulder. straps with holes for the water tube. - Reflective strap design for better safety. - Easy Re-filling! The bladder features an extra-wide diameter screw cap for easy re-filling, and even wide enough to insert standard ice-cubes to keep you cool all day long!