Lens Type 100% UV Protection - These lenses are moulded from special grades of plastic to absorb ultraviolet light. Light Transmission - This is a measure of how much light which hits the lens is allowed to pass through and enter the eyes. The darker the lens the lower the light transmission. Clear lens - Designed for low light where maximum visibility is required. Ideal for indoor swimming. Blue lens - Reduces glare from the water in bright conditions. Great all round lens. Fabric Information Polycarbonate - A high performance plastic which can be produced as a transparent material making it perfect for goggle lenses. Silicone (Compression Moulded) - The variant of silicone is a solid block of material in its base form, and is processed using pressure and heat to give an end product which is soft, flexible and elastic, Ideal for people with sensitive skin.