Highway 21 Primary Engineer Boots The water repelling Tall Primary Engineer Boots can endure most conditions while keeping your feet comfortable and safe. With a removable insole and two-year manufacturer warranty, know that the Primary Engineer is designed for the long haul. Features: 100 full grain leather Water-resistant Waterproof and full length cushioned sock lining Oil resistant, anti-slip rubber sole Removable insole Pull loop for easy wear ability Can be re-soled 1-year manufacturer's warranty