This is a Berghaus 30+6, making it a 36-liter backpack. I used it for commuting for about 2 years. It shows signs of use. I checked inside, and there's no hydrolysis at all; it's still smooth. The rubber on the top of the gray net on the front, the rubber on the top of the gray nets on the left and right sides, and the rubber on the second-to-last belt loop? are all loose. A rain cover can be stored at the bottom. Since I don't have the original rain cover, I used a substitute, but it kept the rain out without any problems. As shown in the last photo, it's slightly torn, but I wore it with the tear facing down, so it didn't get wet. Just in case, since it's not the original, I'll include the rain cover as a junk bonus. I'll dispose of it if you don't need it. Please refrain from purchasing if you are concerned about the condition, as it has been stored by a private individual. Freeflow backpack with breathable back and size adjustment function. - Model name: freeflow Backpack - Color: Purple - Size adjustment function: Size adjustable from S to XL Thank you for looking.