Model Standard Catagory M-8307 EN ISO 20345:2011 S3 SRC Upper High quality brown nubuck cow leather Lining Air mesh lining & amp; Resistant to Abrasion Insock Anti-static, and ventilated EVA Outsole PU/TPU dual density injection Tested By UK Intertek lab (Approved body:0362) Toe Plastic toecap 200 joules Penetration Kevlar plate 1100 newtons Size Euro 36-47#, UK 3-13# MATERIALS AND COMPONENTS Outsole The outsole is made of natural rubber with 15-20% nitrile. The side is sewn with kevlar thread, to improve the binding force between the top and the sole. The rubber material resists 300 ℃ of heat, the latter passes the HRO test, as well as the SRC non-slip. Insole The ventilation fabric can absorb 90% sweat and keeps feet dry. U-design heel support can disperse the pressure of human weight, and reduce the friction between the feet and shoes. The EVA material is flexible and flexible to increase comfort while walking. Toe protection The Plastic toecap end piece can reach 200 joules, it is lighter than that of iron. Penetration protection The Kevlar plate sole, is resistant to penetration, lighter and more flexible than the normal iron plate.