Redback USBOK safety boots are one of the best elastic sided safety (steel toe) 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 flexion. These boots enhance shock absorbance and are slip resistance. They facilitate normal foot functioning including maintaining forefoot flexibility, fore-to-hind foot and heel stability.