Infant Driving Boot from Twisted X Color: Taupe The Infant Driving Moc! Uppers crafted in Fabric, lined with Nylon pull loop, and giving your tiny tot a super-cozy Blend85 footbed. And don't forget that the Blend85 cushioned footbeds are made with 85% recycled foam, plus the ecoTWEED Lining is made from recycled plastics. Of course, it all rests upon a reliable rubber sole.