All you touring types, here is the best (imho) duffel bag out there. Side opening, completely water proof. You roll up the mouth. Years riding in the rain, nothing gets wet. On sale cheaper than I have ever seen. Ortlieb bags. Ripped this info from I-BMW, my K bike friends. These bags are great. I use the large. A medium will hold an aerostitch suit. But the large takes my camping gear or all my clothes for 10 days on the road with room left over. I leave the K bike side bags empty on one side and small gear like shoes, maps, hat etc in the other side. They don't hold much and I don't accordian them out. On the RT there is plenty of room and you will need to put the bag (large one) long wise or it will block the mirrors.