Not sure but I would like to know also. I find that I can keep myself warm on the wing in cold weather but it is very easy to overheat when the temp goes up. I'm sure you guys from the South can give us snow covered Canadians some good advice.
I have the mirror wings, and the lowers. The mirror wings do an excellent job of keeping the wind and rain off my hands. That's what I bought them for. With the mirror wings open, they deflect a lot of air onto you.
The lowers do a great job of keeping us dryer, and again the larger panel does bring in alot of airflow. The smaller panel will bring in the hot air off the rads, when it's hot. Unfortunately, when it's cold, there is not much hot air coming off the rads.
Mark, I called them mirror wings, I guess as per Hosepuller's link, they are actually called handwings, and fasten to the existing mirror hardward under the mirror. As mentioned they really keep the rain, and much of the wind off the hands.
Guys both work well. The hand wings do everthing that horgie says they do & the air wings work not only to direct air in on you when it's needed but keeps more off your passenger when it's not needed. Works well I would add them again to my bike in a heartbeat.
I really like mine. I turn them in in the morning when its cool and it keeps wind off of you and as the day warms I turn them out and you get a nice breeze to keep the engine heat off of you. You'll enjoy them. Mine are on a 1500. I see you ordered for the 1800. Not sure if there is much difference.