Composite toe anti-fatigue rubber boots are made with a unique polymer material that creates a durable lightweight boot (40% lighter than most steel toe PVC and rubber knee boots). Seamless upper is 100% liquid proof. Black pair (Item # 230321) features cleated outsoles. Blue pair (Item # 230320) has outsoles better suited for wet or contaminated surfaces. Self-insulating tiny air bubbles keep feet warm in cold conditions and cool in hot conditions. Tread wear indicator shows when tread has worn away. Great for use in a variety of industries like food processing, farm/agriculture, chemical and petrochemical. 15"H. Men's whole sizes 7-15. NOTE: To convert women's shoe sizes to men's, size down two sizes. Example: Women's size 7 is equivalent to Men's size 5.