Features: -60L large storage space, enough to store various items, and has compartments for easy classification and organization. -The length of the strap can be adjusted freely to fit the human back, scientifically distribute the weight evenly and reduce the pressure on the back. -Using an air diversion system, it has a good ventilation system and will not feel stuffy when carried for a long time. -Made of polyester material, it is wear-resistant, scratch-resistant, tear-resistant, waterproof and dust-proof, strong and durable. -Suitable for travel, camping, mountain climbing, cycling, hiking, outdoor activities, etc. Specification: Material: polyester Capacity: 60L Colour: blue .