I bought these to work in Texas with oil field type work on the reccomendation of guys that have had there's for over two years. They are really resistant to the chemicals we work in at times and of course 100% waterproof. They are really comfortable and I normally wear a size 10 and they fit completely true to size. I wore them for a two week rotation and a week in I noticed a flap was ripped on the side. I don't know if they somehow caught on something sharp or what. No one else has had this issue u work with.  Also while my feet were dry from water they were soaked from my sweating. They didn't breathe at all in 100 degree heat which was uncomfortable. They're a good boot I still believe but just not what I'm going to be using.