The Ridge is an advanced winter boot that meets all requirements for function, warmth and comfort, even in the most extreme winter conditions. Tested down to 60 degrees below zero. The ice fishermen's absolute favorite as they warm despite bad weather! These boots are on really well and fit from October to March with their warming 5mm neoprene! The upper part is softer and more flexible than the bottom of the boots. This makes it easier to move in them without them chafing in the wrong places. Although it is not rubberized all the way up the boot, they are just as waterproof all the way. Highly recommended!