I've toured in convertible pants/shorts for years. I don't find cycling shorts very comfortable except in a very narrow temperature range. I don't have any bunching problem. They're extremely useful for touring in a place like Thailand. I ride in the shorts, but if I want to visit a temple, for example, I zip the bottoms on. I also wear them on airplanes so I can choose to wear shorts or pants depending on the cabin temperature. I got my favorite pair at a shop which is now out of business. I got some others I like at Target, but haven't seen lightweight ones there in the past year or two. I don't like the ones I've seen at REI.