Here's what other sites are saying:
Molded Hypo-allergenic face foam for a comfortable secure fit.Wide helmet compatible strap.Flexible, Polarized double lens with Supravision anti-fog treatement."Magic" lens instantly changes darkness at the push of a button. Never wait for sun-activated lenses to change again!The Uvex F1 is a great medium fit goggle with excellent features. It combines great fit, superb ventilation, and a polarized lens into a cant miss goggle. The lens is a double lens to resist fogging and it's polarized. The lens has the Uvex Supravision treatment which resists fogging, and is very durable.