Pack boots are not your average winter boots. They are heavy duty insulated winter boots that are great for snowmobiling, hiking in the snow, and standing on the ice for a long time. They have a heavy rubber shell to keep water out and a gripping tread to provide traction in the winter snow and on the ice. Inside you'll find a thick wool liner that keeps your feet warm and cozy, even if they get a little wet. The liners can be taken out to dry or exchange for a new pair when they get old.