There's nothing standard about the levels of safety. The higher, boot like version of the Comodius. The Constans is created from a high quality full grain leather upper and nappa leather lining. It's also been exclusively developed for semiorthopedic adjustments especially where customised in-soles are required. Even when customised and adjusted, the shoe still exceeds European Standards of safety. Upper: Full grain leather. Outsole: Vibram® Rubber. Footbed: Hydro-Tec® Comfort insole. Fit: Extra wide. Sizes: 39-47. Vibram® outsole A lot of space for customised in-soles Full grain leather upper Safety standard: EN ISO 20345:2011 S3, SRC Emma MM132070 Constans Vibram Sole Safety Work Boot