They work very well. It took me a little while to figure out how to adjust them to my nose, but once I did, they were comfortable and stayed in place. I sewed mine directly into the mask and didn't use any glue, so I can't comment on that. Edit: 02/13/2021 I ordered them twice. Both times I got great strips with no problems. People complaining must have gotten a bad batch. I find them to be easy to bend and easy to adjust, but they are by no means fragile. I've been using them for many months now and none of them are broken or rusted. And they're comfortable because they're flat, which also keeps my glasses from fogging up. someone said they are too wide. They are 3/8" (5mm) wide which is less than 1/4" wide. It's pretty thin imo. I still don't use glue so can't comment on that, but other than that they work very well. Lots of very positive feedback on comfort from people I have made masks for.
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