Baijinrui 40L Waterproof Hiking Bag/Camping Backpack/Travel Daypack/Casual Backpack for Outdoor Climbing Flexibility and breathable with S shoulder straps, three warehouses Water-resistant & polyester fabrics do not allow water to easily penetrate According to the human body engineering design, soft and intimately, more efficient Mesh belt with zipper mesh bag, can put small items, extremely effective absorption Suitable for sports, travel, hiking, mountaineering, rock climbing and skiing