I own the following:
1.) the Disney parks mask
2.) double layer handmade masks from Etsy
3.) double layer mask from mass retailers
4.) gaiter
I just bought the gaiter b/c I wanted to test it out for walks.
In my neighborhood there's mainly no need for a mask. It's very empty and everyone is polite about crossing the street or walking in the middle of the road if need be.
I still like to carry a mask on me just in case at all times.
At parks, there are times I definitely want to have my mask on.
I thought a gaiter would solve those problems but I'm not really sure it's going to be much help at all.
Which of course research has already confirmed. But I thought it might be good for those quick moments outdoors where it would be easier to pull something up rather than get out a mask.
I put it on and breathed with my hand in front of my face. I felt nothing.
Then I blew out my mouth. I felt all my breath.
Then I put on one of my double layer masks.
Breathed out. Felt nothing. Blew out my mouth. Felt nothing. Blew out my mouth very very hard. Slightly felt something.
Based on that rudimentary, total unscientific test, the gaiter isn't really stopping anything. I would only use it in an outside situation where a mask wasn't really necessary but you just wanted a teensy bit of protection to walk by a group of people quickly without having to take out a mask and then have to put it away.
That being said, I wouldn't recommend it to anyone to wear. If I was outside in a situation where I definitely would need a mask like a boardwalk or crowded park, I would just stick to the at least two layer mask. The gaiter isn't protecting you, and definitely isn't protecting anyone else.
I find my Disney Parks mask easiest to breath in. Large-XL are the normal adult sizes. Look at the measurements and if you think you have a bigger head, nose chin span, definitely get the extra large. The band is a little uncomfortable under my eyes but I take that con b/c it's positives outweight it, including that I fidget this mask the least/it exposes my nose the least.