this review title is: do not waste your time and the content is: do not waste your time with the diffuser i understand that it is collapsible for storage travel but the diffuser will not stay open while in use anytime i would move my hair dryer it would collapse i even tried using it while collapsed but it was useless so it was returned.there are other information for this review, one is this reviewer did purchase it and the other is 1 people think this review is helpful.