These Servus hi strap-on mid overbook have oversized design that allows for easy on/off while the strap makes the top adjustable so that irritating and harmful substances are kept out. Tough, rugged and ready for the dirtiest jobs. Cross Rib outsole provides secure footing. Comfortable net lining for easy on/off . Ozone-resistant rubber resists cracking for long wear. Oversized to fit over bulky leather footwear. Available in yellow color and size-13.