Water and dirt are no match for the Impertech Reinforced Waist Pant. Designed for extreme working conditions, the Impertech pants are made of double-layer knit polyester with a stretch polyurethane coating for easy mobility while you work. TheyÂ’re waterproof, edge-stitched and welded at the seat and knees for durability. An elasticized waist makes getting in and out of them easy without fear of having them move throughout the day.