certified according to the ce en iso 20345 : 2011 s1 src standardsbuffalo split leatherpupu sole for comfort and light weightheat resistant sole up to 200 degrees celsiusoil resistant soleslip resistance as per src standardantistatic inner and outer soleenergy absorption in the heelsteel toe capcomfortable coated steel mid plateeva insoleavailable in s1p. S2 and s3 categorysize : 2 to 13.