Toe Guard Nitro S3 size 41.The Toe Guard Nitro work boots are designed for the toughest jobs performed in a variety of conditions. They feature an oil- and heat-resistant, non-slip rubber sole, a thermoplastic polyurethane nose pad for added protection, and a composite toecap and anti-puncture insole.Topside: water-resistant full grain leatherSole: oil- and heat-resistant anti-slip rubberMidsole: polyurethaneInsole: breathable, anti-microbial, with soft PU padsFit type: wideSafety: composite anti-tip insert and footbed. Safety standard: EN 20345 S3, SRC, HRO..