1. Breathable and waterproof, independent water bag storage design2. The water pipe outlet, night reflector and helmet fixed net design to meet travel needs3. Reasonable storage space design to facilitate the classification and placement of items4. Material: Nylon5. Capacity: 20L (mini tablet, keys, wallet, passport, power bank and other daily supplies6. Occasion: Mountaineering, hiking, traveling, etc.7. Size: 45x39x10cm8. Weight: 280g