I used this bag for mountain climbing, but I'm selling it because I bought a slightly larger one. The following is quoted from Montbell's official website: Regular price: ¥4,200 (tax included) Item number: 1133195 This is a shoulder bag that can be used with confidence even in situations where rainwear is necessary. The seams of the waterproof fabric are joined by welding (heat sealing) to prevent water from seeping in from the seams. A resin panel is inserted into the opening to prevent gaps and prevent rain from entering. It also makes it easy to take things in and out. *This product has high waterproofness, but please note that it is not suitable for applications that require complete waterproofing underwater. Material: 420-denier nylon [TPU laminate] Weight: 88g Color: Dark Green (KHGN) Size: Height 14 x Width 22 x Depth 5.5cm Capacity: 1.4L