I've used it for about a month, and it's in beautiful condition! Aer Pro Collection Pro Pack Slim Backpack Daypack Bag A4 12.5L PC Storage PC Commuting to Work/School Men's Material ＜Outer Fabric＞ 840D Cordura Recycled Nylon Size ＜Body＞ Width: Approximately 305 x Height: Approximately 430 x Depth: Approximately 100 (mm) ＜Backpack Straps＞ Length: Approximately 500-950 x Width: Approximately 20-75 (mm) *Size is measured by our store. Slight individual differences may occur depending on the product. Weight Approximately 830g Capacity Approximately 12.5L