Ash Pocket Tee Shirts with the SP logo screen printed above the pocket. The rear features the famous Cab Forward Mallet steam locomotives that had to back up to go forward. Designed to keep the crews alive while traveling through the Sierras miles of tunnels and snowsheds, the locomotive on our shirt is the only example of this class of locomotive that remains. It can be seen at the California State RR Musuem in Sacramento.