Dry-n-Warm is a footwear drying and warming system for active people. It's portable, convenient, affordable and silent. Dry-n-Warm footwear dryers and pre warmers are engineered to dry safely and completely. This convection heat thermally dries from the inside out without removing your liners. Dry time depends on the dampness of your boots but usually takes no longer than overnight. Warming time takes about 30 minutes.