Men's International Harvester Rubber Boot Expandable Calf Waterproof Work Boots Take on the toughest tasks with confidence in the Rubber Boot Expandable Calf Work Boots, designed for durability and comfort. Featuring an expandable calf for the perfect fit and a rugged, waterproof design, these boots are ready for any job or adventure. Whether you're working in the yard or braving the rain, these boots keep your feet dry and supported all day long!