***UPDATE***
I'm leaving the 4 star rating, because I still wish it was a little bit tighter, I have a smaller head. I found out I am able to wear this with the back a little bit lower so the front isn't up so high; and it still won't fall off. I usually wear this with a hat(tobogan, ski cap, whatever you want to call it). I may pull it down while I run or adjust it and remove the hat depending on weather. It's gotten colder: 20-30 degrees in wet weather and I still love it. I mostly run with the mesh part in front as designed but there was one time i wore it backwards for a more closed mask and I didn't have any problems, it was definitely more restrictive. I love that it has qualities of the more rigid face masks, but it is still a soft gaiter that can just be pulled down around the neck.*****

I have only used this in 40 degree weather so far. It hasn't gotten colder yet. I love it. The only reason why it lost a star was that i wish they had different sizes or that it was a little tighter. It hasn't fallen off at all while doing tempo runs or yassos but sometimes i worry about it because it feels a little loose and low on my nose. I do have a smaller head. Despite that, It works great. The breathable portion is awesome! Best of all, if you find that isn't your thing, the shape is perfectly uniform so you can switch it around and have the regular fabric over your face. I tried looking for a cheaper face covering for early morning cold weather running. I finally found this and saw it didn't have a lot of reviews but figured i would try it. I love it. It keeps my neck and face warm and protected from the cold and wind. I like their idea of the weird breathable mesh in front of the face. It allows more airflow while keeping you warmer. I hated the cold air going directly into my lungs when i was running without it. I'll edit this if i need to as it gets colder.

But they are definitely a wear and wash item so glad there is 2!

Bought a 2-pack for my son & I to go winter backpacking. He didn't even know what a gaiter was, but as soon as he saw it he took it. Said 'Well, this is going backpacking!'

I'm a big guy, but I wouldn't say I have a big neck. It fits snugly around my neck. 4 stars for that.
I've been wearing it for the past hour indoors and it's comfortable. I know it's there though.

It is very breathable.

It is a bit scratchy like about any new clothing item. I'm sure it will soften with a wash or two, which I will do soon. (I don't like the feel of new clothes.)

This is a quality neck gaiter. Not the super thin stuff like many others. Because it is thicker, it is a little less stretchy, so it fits a bit tighter. If you're looking for something that looks good, will keep you warm, and will last, this is a good choice.

Cómodo y funcional, de buena calidad.