The Sled King men's winter boot from Itasca features an outsole with deep cleats which allow you to easily manuever through snow. 400g Thermolite insulation helps to keep your foot warm and comfy, while Perma-Seal keeps snow and water out.
These boots would be nice if they'd stay on. The velcro straps seem to be cosmetic only, as they're not designed to be able to tighten. Unless you're tucking your snow pants into them, the ankle up is too loose, and you're likely to step right out of them in deep snow.