Keeps debris making its way between lens and film strip
Youth size specific
Sold in packs of 3
https://www.mxlarge.com/news/fmf-vision
FMF - Flying Machine Factory - 1973 was founded by a twenty-two-year-old named Donny Emler, a typical Southern Californian who, like everyone else in the 1970s, found a passion for riding and racing dirt bikes. FMF is now one of the most recognizable logos in motocross. The main area of FMF is the highest quality exhaust systems for dirt bikes.