Used for about six months. I used it for commuting, not for mountain climbing. I have wiped it with alcohol. Thank you for your understanding regarding home storage. This backpack is perfect for everyday use, with a timeless teardrop-shaped daypack design and a moderate 18L capacity. In addition to its lightness, the back length and shoulder harness curve are designed to be most comfortable for women, providing a comfortable fit. The main compartment opens wide with a zipper for easy access, and it also has a convenient inner sleeve and organizer. Furthermore, it has a variety of storage options that you wouldn't expect from its clean appearance, including a side zipper pocket for small items on the front, a zipper pocket on the top for smartphones and cards, and a pocket on the back for long wallets and passports, accessible while wearing the backpack. Material: Melange 210D Ripstop Nylon 92, Polyester 8 / Water resistance 1,500mm Size: W27 x H42 x D13cm Weight: 480g, Capacity: 18L Color: (6736) DARK DENIM HEATHER, (6999) LIGHT HEATHER, (7119) HEATHER MUSTARD, (7316) BLACK HEATHER Features: Durable ripstop nylon material with high water repellency, zip-open main compartment access, single-compartment structure, front zipper pocket, top zipper pocket, side zipper pocket that can also hold a bottle, zipper pocket on the back for storing passports, etc., internal mesh zip pocket organizer, Inner PC sleeve, chest strap Back Length: U/42cm Please feel free to ask about discounts.