The Spiro is built with all of the features you would expect from a Cat work boot. Featuring ERGO; a series of design principles that work together to deliver footwear that promotes foot health by integrating stability, flexibility and comfort Conforms to EN ISO20345:2011 Safety Footwear Standards Strobel and Cement construction Removable Nylex and PU Insole,T870 Rubber Outsole Penetration resistant poured PU midsole construction Impact and compression resistant toe cap Anti-static and energy absorbing heel Water resistant upper High heat resistance of 300C,Slip resistance SRC - Resistance against slipping on both ceramic and steel surfaces covered with water and cleaning products Spiro Lace Up Waterproof Safety Boot