Costa Bloke sunglasses offer exceptional performance and rugged good looks with a modern edge that is sure to complement every man's wardrobe Established in the early 80's, Costa sunglasses carries on a tradition of delivering cutting edge engineering and stunning design These rugged full rim frames are made from advanced TR-90 material for unparalleled durability Featuring a non-slip nose pad design and temple tip inserts, these shades deliver comfort and fit Choose the color and tint that matches your lifestyle with the Costa logo at the temples for a contemporary look that suits any activity These sunglasses are available with a mirror coating option on certain colors. Mirror coatings are suitable for protection from intense light. A mirror coating reflects back light and reduces the amount of light passing through the lens. This makes it more comfortable for eyes in very sunny conditions.These sunglasses are available with polarized lenses on certain colors. Polarized lenses have a filter within the lens that blocks the wavelengths of light that cause glare. They can greatly enhance contrast and allow for greater depth of vision, especially in water. They are ideal for any situation where glare reduction is necessary, like driving or playing sports.