Almost IMPOSSIBLE to put on, and collapses far too easily. [SEP] Overall, it's not terrible, but it took me forty five minutes (and two broken fingernails) to get the thing onto my completely standard-sized dryer.  Also, whenever I use it, I find that it collapses down with the slightest touch against my scalp,  which gets annoying when you have a large amount of hair that takes a long time to diffuse.