This visor is easy to open and close with one hand perfect when passing through tunnels and helpful when putting onoff the speedmask visor vautron allows a panoramic field of view and the automatic lenses adjust very fast to varying light conditions as well as being super scratch and impact resistant the visor fits with glassesunique folding mechanism flip up functionenables panoramic field of visionexcellent visibility with carbonic premium optical discs class 1quick adjustmentoptica