20L Large CapacityAmple storage space with multiple compartments, fitting essentials like a 13-inch laptop, camera, and more. Breathable and ComfortableFeatures a breathable mesh back panel and pearl cotton padding for airflow, keeping your back cool and dry. Durable Water-Resistant FabricTear-resistant nylon with water-resistant properties protects against splashes and rain. Adjustable Dual BucklesChest and waist buckles provide a snug fit, reducing pressure and enhancing comfort during hiking and outdoor activities. Compact and PortableFoldable design includes a bonus storage bag for convenient packing when not in use.