Lightweight S3 composite side zip boot with Poron XRD extreme impact metatarsal protection Poron XRD technology is designed for comfort and to carry out the same tasks as a normal less flexible external metatarsal boot, Nubuck top grain leather upper, YKK heavy duty side zip for easy on/off action, Breathable thinsulate CI cold insulating mesh lining, Waterproof membrane lining, Quality comfortable PU insole, Poron XRD internal M-Guard, EVA/Rubber cemented HRO heat resistant outsole, Anti-static, 200 joule composite toe cap, Kevlar midsole, Shock absorber heel, TPU protective scuff cap, SRC rated slip resistance, Conforms to EN 20345:2011 S3 WR M CI HRO SRC