Completely useless advice but the best boots I have ever used are from a long since defunct company. It was a company called Line7 (French I think) and I bought a pair (plus another for my fairly new at the time wife) back in the mid 90's. Proper fabric boots with goretex and vibram soles a bit chunky but sooooooo comfortable and seriously long lived, still brilliant, waterproof and solid. Now I am no sherpa Tensing but we have done a fair milage in them and I do worry how I will ever replace them. They are that comfortable.