I'm curious- I breath about 95% of the time through my mouth when I'm riding. Never thought much about it, but I've been eating quite a few bugs on my morning rides lately. I've also been getting headaches after some of my harder rides. I started trying to try breathing through my nose, but found it extremely difficult to do so for extended periods of time- it just doesn't feel natural. I know the nose has filtratration, but are there other advantages that any of you know of? Thanks for any advice you can lend!