Used only once for a tent stay. Overall it's clean, but there is one stain (see image 7), so please refrain from purchasing if you are concerned about this. The following is a quote from the web page: ■ Waterproof dry bag that can expel air in a sealed state. By using waterproof and breathable eVent fabric for the bottom, it can be compressed compactly. Instead of compressing with valves or straps, the opening is rolled to release the air inside from the bottom. The bottom is oval-shaped and flattens to fit the internal shape of the backpack. With the Evac dry bag, you can not only protect your luggage from getting wet, but also save space. ・Excellent waterproofness due to double stitching + seam tape processing ・The roll-top part made of Hypalon material prevents moisture from entering ・Dry bag sling (sold separately) can be attached for carrying over the shoulder ・The bottom made of waterproof and breathable eVent (R) material pushes out the air inside and prevents moisture from entering ・Oval bottom shape that is easy to pack and prevents rolling Material Body: bluesign (R) certified 70D recycled nylon + C0-PFAS free water repellent treatment Bottom: 70D eVent (R) laminate