These single lens designer style glasses are made from class 1 polycarbonate and offer the same level of protection as all of the Napier optical range. Available in Vermilion, Sodium Yellow or Clear lens. The Vermilion lens is Ideal for low lighting and enhancing orange clays. This lens improves visual depth, reduces eye strain, enhances visibility and offers the greatest amount of contrast. The sodium lens is Ideal for fog, haze and extreme weather conditions this lens filters out blue light. The clear lens offers high impact protection with natural vision.