The soft suede leather styling and plush fleece collar on the Sorel Waterfall(TM) make it easy to overlook the waterproof seam-sealed construction, but this boot is built to keep your feet dry and warm--even all the way down to -40degF. A locking zipper on the lateral side ensures a proper fit to keep your toes comfortably enveloped in a soft layer of fast-drying Thinsulate(TM) Ultra insulation. The rubber cupsole tread helps keep you balanced on a variety of frozen surfaces but unlike Sorels of old, the sole is completely non-marking, so you can walk across untracked white indoor floors without leaving a trace.