The 4" Work Chelsea UltraLite X™ Boot is designed with UltraLite X™ technology that uses lightweight yet supportive materials to keep you comfortable all day. It is also oil and slip resistant, providing you with safety and peace of mind. Utilizing advanced support technology and slip resistance for added protection, the 4" Work Chelsea UltraLite X™ Boot is the perfect companion for any on-the-go job that requires you to stay on your feet.