YKK circular side-zip for quick donning & doffing, Waterproof, durable 2.0mm full-grain leather upper, Cambrelle® lining, Agion® anti-bacterial treated lining, ¾ bellows tongue, Padded foam collar & tongue, Non-metallic scanner safe hardware, Lightweight composite hardware, Composite plastic toe cap & penetration resistant plate, Injection moulded thermoplastic (TPU) reinforced heel counter, M-P.A.C.T. contoured insole with memory foam for extreme comfort & support, High traction, SRA slip resistant, durable carbon rubber outsole with X-Traction & ladder grips – anti-static, acid & alkali resistant, & insulated against hot & cold, Tested & certified to European Standard EN 20345 for safety footwear with SRC slip resistance, Full certification: EN ISO 20345:2011 S3 SRC, 758g per boot (sample size 8), Under ankle 6 inch cut & non-sidezip options also available