I don't remember exactly when I bought it, but I think it's been about 6 years. I haven't used it much. I'm not good at storing things, so it's wrinkled. However, I've kept it stored at home. There is a little bit of dirt, but I think it can be used normally. I think the seam tape is also fine. I'm giving it away because I don't have a chance to use it anymore. I think it was for 50-70L.