Size: Medium / Large I don't remember the exact purchase date, but I think it was about 5 years ago. I used it about 10 times for day hikes. The zipper on the waist is rusty and a little difficult to open and close. Also, there are scratches and stains as shown in the photos. I checked carefully, but there may be oversights. * The included backpack cover is not included. It has been washed with water. I have injured my knee and have decided to quit mountain climbing, so I am selling it. I think it can still be used actively. I will ship it in a plastic bag. Thank you for your understanding.