Blundstone RotoFlex 9063 Zip Side Safety Boot The RotoFlex #9063 reimagines premium comfort and protection. Utilising the GripTek® Extra Heavy Duty rubber outsole and SoftCell® comfort system, these design principles are all wrapped up in a laidback stone nubuck. Features Stone water-resistant nubuck leather upper safety boot—150mm height Seven rows of lacing hardware, including lace locking device Laces are manufactured from recycled PET Durable, heavy duty zip with industrial grade zip fastener Lining made from recycled PET offers moisture wicking and long lasting performance Heavy Duty TPU moulded toe guard designed for superior leather protection   INFINERGY® - E-TPU, a super elastic energy foam that is soft but resilient, providing enhanced cushioning and reducing the impact of every step. GRIPTEK® XHD - biomechanically engineered rubber (PUR) outsole designed for optimum grip and stability- heat resistant to 300˚C- fuel oil resistant- excellent abrasion, cut and slip resistance FORTASHIELD - broad fitting, cut-resistant steel toe cap tested to resist a 200 joule impact. AIRCELL - uniquely constructed zoned airflow footbed is designed with specialised breathing channels to activate ventilation, moisture control and provide full-body cushioned comfort. The footbed is anti-bacterial, washable and breathable. SOFTCELL® - the overarching comfort system utilising a combination of specialist materials and the unique biomechanical foot-cradling design to increase stability, balance, comfort and manoeuvrability. Designed to reduce the risk of trips, slips and falls.