It's time you wore a work boot that's designed for the job you do. If that job is drilling work in the gas and oil industry, get ready to for a great boot. The Rocky Elements Shale Waterproof Work Boot was created to withstand the harsh conditions of drilling work. It's triple-stitched in areas that get a lot of wear. The outsole is direct attached, bonding it to the upper and resisting breakdown. Material: Leather.