This is the "cierzo18" backpack from ARC'TERYX. It's made of very thin nylon and is packable, meaning you can turn it inside out and store the main body in the front pocket, making it useful as a sub-bag for travel or business trips. The main pocket has a double zipper. There's a simple frame-like axis at the top of the pocket, which is convenient for hanging gear. The shoulder straps are made of nylon tape about 4cm wide, with gray on the upper part and black below the adjusters. Regarding the exterior, there are minor scuffs from use, but it's generally in good condition, having been used for travel. It's a beautiful USED item without any major damage such as tears, stains, or holes. The interior has some peeling and stickiness of the coating (a common issue with Arc'teryx bags). When cleaning at home before listing, I removed as much of the peeling coating as possible. Also, I've treated the stickiness with a silicone spray to reduce it. [Official Specifications] Size: W26cm x H44cm x D15cm Capacity: 18 liters Shoulder strap: 45cm~85cm Color: Black Material: 100% Nylon Coating: 100% Polyurethane Weight: 260g Thank you for your consideration.