MATERIAL: The internal frame backpack uses nylon fabric and is equipped with YKK zippers, which is durable; the size is 33.5'*13.8'*11.12', and the capacity is 70L. Its large capacity and high quality can meet your outdoor needs! INTERNAL FRAME: This backpacking backpack is designed for long-term travel and mountain hiking, with a lightweight aluminum alloy frame plate on the back to provide maximum load-bearing capacity. CONVENIENT ACCESS DESIGN: This 70l hiking backpack has a zippered entry on the side for easy access to the main compartment. A water bladder can be placed in the backpack to quickly replenish water and energy (water bladder not included). The bottom of the backpack has a compartment for shoes or a sleeping bag. CUSTOMIZABLE COMFOTR: This 70L camping backpack features a multi-position torso adjustment to fit men and women of all sizes.