Ex Raf goretex. I have 2 pairs, one cut off for biking, the other full lenth. Really good quality. They come in many waist sizes and lengths but not all the time. You have to keep looking until your size comes up. There are several sellers on eBay but some that are not. It can be a bit of a hassle searching for the size you want but I think we’ll worth it. They will cost about £30 , mine were brand new.