MATERIAL OUTSOLE STANDARD FHC TPU/PU all from EN 345 SB - S3 S1 Dry areas with electrostatic discharges and high risk of toe injuries S1P Dry areas with electrostatic discharges and high risk of toe injuries;nails,splinters and sharp objects S2 Areas with high level of humidity and/or hydrocarbons and a high risk of toe injuries S3 Areas with high level of humidity and/or hydrocarbons and a high risk of toe injuries; nails, splinters and sharp objects