These safety trainers have been constructed with a breathable mesh fabric upper and innovative printed pu cage designthe 200j non metallic safety toe caps and non metallic penetration resistant insole offers the highest level of protection whilst the hard wearing slip resistant and fuel oil resistant rubbereva sole allows for unrivalled grip antistatic amp cushioning construction with a full length ergonomic footbed certified to en iso 203452011 category of protection s1 p src