Oakley's exclusive lens technology for optimal contrast vision in the mountains under varying light and snow conditions.Changeable Lens: YesFits with Glasses (OTG):YesHelmet Compatible: YesAntifog Technology: F3 anti-fog coatingFoam: Triple-Layer Face FoamIncl. Extra Lens: NoMore technologies: Prism SnowRidgelock Seal makes lens changes a snap and will ensure a tight seal to protect against the environment50mm wide adjustable strap will allow you to set the size to your likingMicrofibre bag is included