This incredibly lightweight multifunctional backpack is perfect and useful for the excursion and any other outdoor activities and features headphone exit, side adjustment system of a backpack, waterproof backpack with rain cover, resistance to wear, a design of outer auxiliary cabin, water pipe buckle system, web massage shoulder, artificial super breathable braces, air mesh, high-density ribbon. Perfect for camping, hiking, traveling, climbing, and others. Material: High-quality nylon. Water pipe capacity: 50L. All dimensions are approximative: 13" x19" x5-1/2".