The UNIGEAR Hydration Pack Backpack with 70 oz 2L Water Bladder is a versatile and lightweight option for outdoor activities like running, hiking, and cycling. Made of durable nylon material, this backpack features an aerodynamic design, adjustable straps, and a replaceable bladder for added convenience. With a capacity of 2L and a splash-resistant front pocket, this pack is perfect for staying hydrated while on the go. The compact size of 16.5 x 8 x 6.0 inches makes it easy to carry, and the adjustable straps provide a comfortable fit for both men and women.