Redback UBOK Work boots are one of the highest selling elastic sided work boots by Redback. The TPU sole is fuel & lubricant resistant, a Urethane Air cellular midsole improves shock absorption. Redbacks unique Anatomic Sole cradles the foot to reduce arch flextion (sagging). Redbacks are recommended by leading Podiatrists. * All leather 3 piece upper * Full-length footbed and arch support featuring 3 layer * TPU sole technology * 130°C heat resistant * High oil / acid resistance * Superior slip resistance Note: Reback boots are built with injection technology. Some small air bubbles or broken air bubbles on the midsole or outsole as shown in photo are not the manufacturer's defects. All shoes built with injection technology will have the same characteristics.