Years ago I had a set of folding aluminum hangars that were by far the best travel hangars I've ever seen. They were light and packed absolutely flat. Alas, they finally gave up the ghost (kind of fell apart) and I've never found a really suitable replacement. I have the inflatable ones, and also bought another pair that were kind of a rubber material (they were ungainly and I ended up using at home for sweaters, etc. since they were fairly flexible) but not good for travel.
Is there anything else out there someone has found good? I also have a travel clothes line but more often than not they are hard to actually use in many hotel rooms, I've found (hard to find immovable objects to attach them to that are the right length, etc.).