The capacity is 50 liters,a big volume outdoor backpack can hold the almost everything you need in a 3-7 days long trip.Just right for youth and adults. Padding shoulder straps are adjustable for your size and load. The shoulder strap is equipped with a sliding buckle for easy adjustment to a comfortable position Ergonomic carrying system, large ventilation, reduce the burden of walking, comfortable carrying, heat dissipation and perspiration, protection of the spine, still easy to carry for a long time TRIPFUN'Idea TRIPFUN focuses on creating functional appliances such as outdoor exploration, city cycling, short trips, etc. According to different types of travel needs, you can always find the one that suits you, regardless of the situation, and enjoy the fun of exploration. Specification： Gender: Unisex (Men,Women) Weight: 1.1KG Material: Nylon fabric Capacity: 50L Zipper: Quality zipper Carrying: CR Carrying System Size: 65cm* 22cm* 32cm Occasion: Tourism, hiking, climbing, skiing, camping Read more USB Charging&External Headset With bulit in usb cable,plug into your power bank.Please pay attention that power bank is not included Plug your charging cable into the external USB port Plug charging cable into your phone and begin to charge Bottom of the Backpack Small bag at the bottom, used to store the rain cover for easy storage It can also be used to store some commonly used small objects Main Pocket Large capacity, it can store clothes needed for 3-5 trips, as well as sleeping bags, laptops and other items You can also store enough snacks for the family to eat Read more Waterproof Nylon Protect the backpack from rain and keep the interior dry Quality Fasteners Prevent items in the bag from falling Top Inner and Outer Pockets Place some small objects, which can be quickly found during the journey Steel Frame Removable Reduce burden Read more 50L Hiking Backpack Black 60L Hiking Backpack Black 25L Backpack 35L Hiking Backpack 40L Hiking Backpack Purple 50L Hiking Backpack Waterproof ✓ ✓ ✓ ✓ ✓ ✓ Rain Cover ✓ ✓ ✓ ✓ Weight 2.42 lbs 3.37 lbs 1.5 lbs 2.5 lbs Separate warehouse ✓ ✓ Two Zippered Hipbelt Pockets ✓ ✓ ✓ ✓ ✓ ✓ Size 12.5 * 8.6 * 25.9 in 12 * 9.8 * 27.6 in 10.2 * 5.1 * 20 in 9 * 9.4 * 20.4 in 12.9 * 7.8 * 22.8 in