A reference to a motorcycle jacket made by BMW which is branded as a Ralye II Pro Jacket. Made famous by Ewan and Charlie on their Long Way Round tour. Bought by riders wanting to look the part when they're off down the cafe on a Sunday on their bike. Round the world wannabe's with all the gear and no idea.
Have you seen all those 1200 riding tossers in their twat jackets hanging around outside The Ace Cafe?