Oakley frogskins™ is a timeless square frame that embodies the spirit of exploration and adventure. The matte black color paired with prizm violet lenses creates an edgy look that's perfect for any occasion, while the key bridge adds some retro flair to this modern square frame. Crafted from durable yet lightweight o matter material, these sunglasses are built to last and ready to handle whatever you throw at them. Available with lens contrast enhancement technology. - frame material: o_matter