outwears

what is an outwears for an air filter or air box?

wondering what it was and how it preformed. if you have any comments or even a pic or 2 let me now.

outerwears for a filter is to stop big dirt from getting at the filter, so it keeps the filter cleaner longer. For the airbox outerwear its for if you remove your lid you putit over to keep dirt and stuff out of your airbox