I used this for hiking, etc., but I'm selling it because I bought a new one and no longer have a chance to use it. As shown in the images, there are two brown stains on the bottom and a few small pinholes from mountain pins on the sides. There is no problem with use, but if you are concerned, please feel free to comment. Nike Elemental Backpack CK0944-010 This backpack is designed to be versatile, suitable for workouts, commuting, and school. Key Features: * Large Capacity: There is a large zippered main compartment that can hold shoes, gym wear, school textbooks, laptops, etc. * Easy-to-Organize Pockets: There are multiple zippered pockets on the outside for organizing and storing small items and electronic devices. * Comfortable Carrying: Padded shoulder straps and a back panel are used to provide a comfortable carrying experience. * Convenient Haul Loop: It has a convenient haul loop (hand-carry loop) that allows you to choose how to carry it. * Use of Recycled Materials: This product uses more than 65% recycled polyester fiber, considering sustainability. Size: * Approximately H 47cm x W 30cm x D 16cm (Height x Width x Depth) * Capacity: Approximately 24-25L Material: * 100% Polyester (May also be a mix with nylon) * There are pockets for beverage bottles on the sides. * Spot cleanable. Thank you for viewing.