When using your DUS-T in a dirty environment and the face mask gets sawdust or dust on the outside of the mask, before rolling it in on itself to stow, give it a snap by grabbing the face mask, pulling it outward and let go! This will remove the debris on the outside of the mask before stowing back in the neck.
When you become an inventor with the next big idea, get ready to do whatever it takes to take it to market. Make sure you are passionate, vested and everyone around you has your back. Make sure you aren't the type to give up or give in and you will succeed.