Bright and sunny conditions require a dimming lens tone.
Bluebird? The dimming smoke lens is your choice.
UV400 & Anti Fog refers to the intense UV protective qualities of HEAD lenses and their ability to minimise fogging. The light on the mountain is intense so you need the best protection possible as well as anti-fogging qualities to maintain the best visibility.
FMR is HEAD’s flashy mirror finish to their lenses providing added protection against sunlight. Light on the mountain is intense so riders need the best protection possible.