The oakley holbrook™ discover collection sunglasses are a timeless design that embodies the spirit of exploration. Crafted from o matter frame material, these square-shaped shades feature a key bridge and prizm black lenses for enhanced contrast and depth perception. With their dark matte stonewash opaline color, they capture the essence of adventure in an iconic style that's ready to hit the road whenever you are. Available with lens contrast enhancement technology. - frame material: o_matter