Important Note: The AU size is stamped on the bottom of the boots, not the US size. Made of premium black oil-tanned leather, these Chelsea safety boots offer durability and protection while maintaining a sleek, professional look. Maximum Safety Features: The #179 boot includes a Type 1 broad fitting steel toe cap that resists 200 joules of impact, a non-metallic penetration-resistant insole, and electrical hazard resistance for ultimate safety. Comfort Classic Footbed with XRD Technology: Featuring a removable Comfort Classic PU/foam footbed with XRD Extreme Impact Protection inserts at the heel and forepart, these boots absorb impact and provide all-day comfort. Kick Guard and Rugged Outsole Protection: A Kick Guard protects the leather from scuffs, while the TPU outsole is resistant to oils, acids, organic fats, and heat up to 284˚F, ensuring long-lasting wear. Ergonomic Design with Arch Support: Designed for comfort and safety, the boots feature a PU midsole for support, a 6mm tread outsole, and a full heel breast with arch support, perfect for ladder or gantry work.