frameless design for a large field of vision. the sinner avon goggle offers you a modern, frameless design so you can enjoy a wide field of vision and endless style. the outrigger system ensures a seamless fit with your helmet. the double lens design with anti-fog coating in combination with ventilation channels in the frame prevents fogging of the lens. as the crowning glory and heart of the goggle, the sintrast® high contrast lens ensures high-contrast vision with a special light filtering system. sintrast® blue lensthis lens provides perfect vision on sunny and slightly cloudy days. a special filter technology ensures comfort for your eyes and high-contrast vision.filter category: 2transmittance of visible light: 13 % - 17 %