Flak 2.0 XL polarized deep water men's sunglasses from Oakley have a matte black plastic frame that is lightweight yet durable. The Prizm lenses measure 59 millimeters, and the sunglasses feature a standard fit. Prizm is a new lens technology that is designed to fine-tune vision for specific activities and sports. The Plutonite lenses also feature top-tier UV protection. The comfortable three-point fit ensures these sunglasses remain in the right position for precise alignment.