The size of this outdoor backpack is about: 19.3in×8.3in×11.8in, with multiple layers of internal storage, sufficient cargo space, larger space gives you more loading possibilities, suitable for day trips, camping, gyms, etc.; Reliable material: 900D high-density Oxford waterproof fabric is used, which has the characteristics of tear-proof, water-repellent, and strong wear resistance, which can well protect the items in the backpack; Good breathability: The carrying system designed to fit the structure of the back of the human body can effectively disperse the pressure and bring a very comfortable feeling, and has the effects of rapid heat dissipation, perspiration and ventilation; APPLICABILITY: Outdoor backpack can be used as assault bag, off-duty backpack, hunting backpack, survival backpack, military backpack, school backpack or everyday backpack. Choose our bags to make your trip more enjoyable; Galloping outdoors, a must-have backpack for outdoor travel enthusiasts, the backpack has adjustable sliders in many places, and the size can be adjusted according to your own situation;