Trekking Backpack with 2L Water Bladder, Waterproof Travel Pack for Hiking Camping Running, Professional Hiking Backpack for Men Women Kids BPA Free 2000 PROFESSIONAL MULTIFUNCTION TREKKING BACKPACK: The backpack with multifunctions makezs the travel be lighter and safer. Except the common storage functions, there is a hidden rolled up net with 2 hooks on the botton can attach your helmet on the backpack. Quick release buckle is also with a whistle for emergency. The elastic rope on the surface is adjustable, can be used for store sweat towel, etc. We also add reflective strip on the bag, let your night activities be safer. LARGE CAPACITY: Composed by 2 main front compartments, 2 side zipper pockets and 2 side mesh pocket. The bottom main pocket can be used for grocery, food, clothes, water bladder and other essentials. The other compartment can be used for survival gadgets, or camping equipments, like powerbank, flint, cutter, etc. The side pockets can be used for some easy access accessories, snacks etc. LIGHTWEIGHT AND WATERPROOF FABRIC: Only about 430g. The whole backpack is made of lightweight polyester, anti-scratches, waterproof, durable to use, easy on and off. Hydration backpack is for men, women, teens, and youth. Quick buckle is fully adjustable and fits all sizes comfortably. 2L WATER BLADDER: 2 Liter (0.5 Gallon) BPA free bladder made from food grade approved materials. Leak proof and easily removable via the main pocket. Wide screw cap allows ice for cooler drink makes cleaning easy. Complete with kink-free tube soft high flow bite-valve with easy 1-handed shutoff button. PERFECT BACKPACK FOR OUTDOOR ACTIVITIES: Designed for comfort, the hydration pack is ultra-light, streamlined, and easy to adjust. Your essential backpack for outdoor activities, raves, hiking, biking, climbing, running, etc. Product Dimensions ? : ? 45 x 25 x 5 cm; 400 Grams TTTPB09YCR4S43