This is the Aer 10th Anniversary Limited Edition Day Sling 3 Ultra. This is a convenient size within the Ultra series. The following is a reprint from the official page: The main material uses Challenge Sailcloth's Ultra400X, which is overwhelmingly superior in abrasion resistance compared to nylon and other materials, and is about 20% lighter. Ultra is a fabric made with UHMWPE (ultra-high molecular weight polyethylene), which is water-resistant and boasts 15 times the strength of steel per gram. The Day Sling 3 Ultra is a multi-purpose sling bag designed for travel. In addition to the main storage, which makes it easy to take things in and out, it has multiple functional pockets for storing daily necessities. The back pocket can also safely store passports and cards. Features Challenge Sailcloth Ultra400X (exterior) YKK® zippers Duraflex® hardware Strap with Fidlock® magnetic V-BUCKLE Front pocket with key chain Smart organizer for storing everyday essentials Back pocket for safely storing passports and wallets Dimensions Length: 29cm Width: 15cm Depth: 7.5cm Weight 360g Volume 3L Please refrain from purchasing if you are concerned, as it is stored at home (in a cool, dark place). We do not accept any claims or returns, so please inquire in advance if you have any concerns. We plan to ship in the most cost-effective way possible. We are also listing this on other flea market sites, so please understand that we may remove the listing if it sells there.