Practical Outdoor GearThis hydration system consists of a backpack and a water bladder. Replenishing your body with water at any time. The best companion in your outdoor adventures such as riding, hiking, climbing, camping, etc.Lightweight and BreathableThe trekking backpack is made of premium 600D oxford + mesh fabric, lightweight , rip-resistant and durable. With ergonomic design, the porous, soft, breathable, and adjustable mesh shoulder straps and back panel reduce burdens on your shoulders.Reliable Hydration SystemA 1.1m long hose and 2L water bladder are composed of food grade TPU, BPA free and leak-proof. Gone through pneumatic pressure, swing and vibration test, the water bladder are tough enough to allow you to engage in any vigorous activities without worrying about water leakage.Perfect SizeHydration backpack size is 48x23cm/18.9 x 9xinch. The110cm hose is long enough to feed water to quench your thirst at any time. With adjustable shoulder straps, will fit chest size teenagers/kids with 27" up to adults (men and women) with 50".Safer at NightThe reflective strips on the front side keep you safe in low visibility conditions. The elastic tighten belt not only prevent your item bouncing but also can hang some accessories.