Review (4/5): great for travel but doesn't fit all dryers
The only way to take a functional diffuser for travel. However, I got two of them and both have had the little round buttons on the spikes come off. You can't glue them back on because the heat would melt the glue. Still work, but it's a bummer.
Also, these don't fit all dryers, especially if you have a mini-dryer for travel. I still make it work, because having curly hair the most important thing is to make sure you have a diffuser....even if you have to hold it on! Fits gun style dryers well.