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Caulk boots, calk boots, or cork boots (pronounced "cork" and usually called "corks") are leather nail-soled boots worn by loggers and tree planters in the timber-producing regions of the Pacific Northwest and Canada. 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.