Review on CleverFit Stainless Travel Collar: Adjustable for Perfect Fit by Rich Rickenbaugh

They worked fine when I smeared them (with Houdini oil, machining oil, not WD-40 or anything else that will mark and ruin a shirt collar). Before that, 3 out of 4 got stuck so I couldn't resize them. I've used them 1 time in a shirt with a notoriously tight collar for most seating and they were better than the plastic ones but a little thick so the collar ends up about 1/8 inch when folded. I also took them on my recent business trip and it was nice to have a pair instead of the small plastic bag with several different sized pairs that I usually take with me.