1. Material: The large hiking backpack is crafted from quality waterproof 600D Oxford fabric, offering tear resistance and durability. 2. Large Capacity: This 100L hiking backpack features one spacious main compartment and multiple pockets for ample storage. The main compartment can hold clothing, blankets, travel essentials, and sleeping bags, making it suitable for 23 people's camping gear. Four external attachment points allow you to secure tents, moistureresistant mats, trekking poles, sleeping pads, picnic mats, and more. 3. Ergonomic Design: The backpack's back panel incorporates a comfortable carrying system that maximizes breathability, comfort, and support. The wide, adjustable shoulder straps reduce strain, while the breathable mesh padding keeps you cool and dry during hikes. 4. Expandable: The largecapacity hiking backpack measures 40cm in width, 30cm in depth, and 7590cm in height. Its selfadjusting base design allows the backpack to remain compact at 70L (75cm height), meeting general carryon requirements for easy transport. When additional space is needed, simply expand the base to increase the capacity to 100L.