These boots will keep you warmer than Sorel boots and there are no liners to put in and pull out to dry. 100 “% waterproof. I used them for standing hours in my deer stand and standing on ice while ice fishing. They hold air that’s blown in by you they have little pet cocks on the sides. If you plan on jumping out of a plane they must be deflated ( just kidding) These boots were made for our service members they were made in the USA. They look clumsy but there not bad for walking.