If you're someone who likes to do cardio when it's cold out, then you have probably suffered from this. I was using a simple bandana before, but it was very uncomfortable and ineffective by comparison. As someone said, this mask kind of makes you look like a ninja. I was thinking it makes you look more like Hannibal Lecter with his anti-cannibal muzzle on. But nonetheless, this will help protect you from the dastardly Icicle Lung.