The upper part: - Extra strong premium smooth leather with high wear resistance and highly resistant to moisture.Lining:- DryTex lining for air and moisture circulation.Toe box: - Plastic toe cap in XL size for maximum comfort.Outsole protection:- Flexproof outsole protection made of Kevlar lightweight and flexible outsole with shock absorption.Insole: - Ventiflex inner liner for good foot ventilation.Insole:- Abrasion-resistant polyurethane layer to resist grease, slip, anti-static.Width:- The width of the shoe is designed for wide feet.Additional information:STANDARD UNI EN20345:2011 S3 SRC