Model: Lupton Small (SS552006) Gender: Men's Frame Size (mm): Lens Width Bridge Temple 61 16 135 Frame Materials: Eco-Nylon Frame Description: Same look, just smaller. The Serengeti LUPTON S small men’s sunglasses with PhD™ 2.0 lenses raise the bar in eyewear. Built with environmentally-conscious nylon, the LUPTON S small sunglasses for men are eco-friendly, and also feature soft temples and rubber on nose pads for comfortable, all-day wear. Stay sharp in the LUPTON SMALL. Lens: PhD 2.0 Polarized 555nm® Category 3 to 3 in mineral lens.Category 2 to 3 in PhD™ 2.0 lens. Very bright light conditions.The polarized lens is ideal for boating activities. Absorbs 79% to 92% of the visible light, according to the lens.Blocks 88% to 96% of the blue light, according to the lens. 555 nanometers marks the center of light’s visible color spectrum, right on the border of yellow and green. This is where the human eye sees best. In low light conditions, this lens allows more yellow and green to pass through, creating relaxing conditions for the eyes, while the light silver metallized mirror coating (available only on mineral lens) reflects glare. Photochromic Polarized Spectral Control Warranty: 1 Year Manufacturer Made in Italy Authorized Serengeti Dealer