Redback USBBL is the least expensive Redback in the range. It has the same sole as more expensive models, but uses a less expensive leather than the USBOK safety boot. 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.Specific Workplace Use: To provide comfort and protection from entry of foreign matter during extended periods of wear in heavy indusrial environments.General Use Properties:- Enhance shock absorbancy and slip resistance- Encourage normal foot functioning including maintaining forefoot flexibility, fore-to-hind foot and heel stability.