Features： 1、ROUND BUCKLE DESIGN: Hydration pack is designed with a round buckle at the shoulder strap to hold glasses. Has enough water and equipment capacity and provides easy access. 2、ERGONOMIC DESIGN: Outdoor hydration backpack is ergonomic and fits your shoulders, chest and waist, which keeps your body in the best condition. 3、STABLE PERFORMANCE: Hydration pack features a delicate pack design that is comfortable to carry. Stable performance and outstanding shock absorption. 4、APPLICABLE SCENARIOS: Hydration backpack is suitable for camping, running, cycling, hiking, hunting, climbing, kayaking, skiing, snowboarding, etc. 5、OXFORD CLOTH MATERIAL: Hydration carrier backpack made of oxford cloth, soft texture, comfortable and wear resistant, with good breathability, universal for men and women. Specification： Item Type: Hydration Backpack Material: Oxford Cloth Capacity: 3.5L Size: Approx. 44.5x17x4cm / 17.5x6.7x1.6in Applicable Gender: Universal Package List： 1 x Hydration Backpack