Caulk boots, calk boots, or cork boots (pronounced "cork" and usually called "corks") are leather nail-soled boots[1] worn by lumberjacks in the timber-producing regions of the Pacific Northwest and Canada.[2] They are worn for traction in the woods and especially in timber rafting, and were part of a lumberman's basic equipment along with axe and crosscut saw. Loggers and others who work in the woods still wear corks today.