These Red Wing Heritage 8146 Classic Moc 6" boots are made out of Briar Oil Slick leather. The Roughneck is inapired by they boots worn by oil rig workers of the mid-20th century. To honor the "roughnecks". Red Wing produced these badass boots with a chunky Vibram lug sole. Red Wing has been making moc toe boots since the 1950's and there's a reason they're still made today. They're just damn good boots.