Great idea, poorly executed [SEP] Bought this for travel but returned it immediately. It does NOT fit my BaBylissPRO Tourmaline Titanium Travel Dryer (I can get it on, but it's way too loose, falls off almost immediately). Also it's very easy to collapse the diffuser, you barely touch it and it's jumping back into it's small shape, very annoying when you're trying to dry a lot of curls and have to keep pulling it open again and again.