Timber II Thinsulate CalkOur Timber 2 Calk is designed with a stronger rubber bottom than it's predecessor. A durable, waterproof shell built with a rip stop inner lining makes this boot super tough, helps prevent cracking, and extends wear. Thinsualte liners keep you warm when you're active, and easy to use replacement calks make upkeep simple. Product features: Replaceable calks for easy maintenance Removable 200G Thinsulate Liner Made in Idaho 7 7 oz. Oil Tanned Leather