The Giro Index OTG is has been a standard for skiers and snowboarders who need to wear glasses underneath their goggles. The taller and deeper frames are very accommodating to create the extra space for glasses. An Anti-Fog Coating will help keep your lenses clear, even when you are working up a sweat or skiing in humid conditions. A Cylindrical Thermoformed Lens offers up a wide field of view for you to take in the mountain views. Double Layer Face Foam with Microfleece Facing keeps a snug seal across your face and does a great job of wicking away moisture from your face, should you start to get sweaty. If you have never been able to find a goggle that fits easily over your eyeglasses, the Giro Index OTG is the goggle for you. Medium Size OTG Frame, Cylindrical Thermoformed Lens, Double Layer Face Foam with Microfleece Facing, Anti-Fog Coating, Seamless Compatibility with all Giro Helmets, Race: No, Category: Adult, OTG: Yes, Helmet Compatible: Yes, Spare Lens Included: No, Goggle Ventilation: High, Goggle Lens Change: Permanent, Frame Size: Medium, Lens Shape: Flat, Lens Type: Polarized, Model Year: 2019, Product ID: 492662, Model Number: 7083050, GTIN: 0768686059780