If you need the warmest option out there, the Baffin Impact is the boot for you. These massive, heavy-duty boots have a synthetic liner that's removable, in addition to another layer of insulation fixed on the inside of the shell.

There isn't much difference between rain boots and snow boots, but there are some key things you need to know. Snow boots generally have a thicker sole and are made from more synthetic materials. They also tend to be taller, usually going up past your knee, while rain boots typically stop at mid-calf.