If you're looking for performance sunglasses that will give you an edge over the competition, the Oakley Half X Sunglasses are the optimum choice. First and foremost, the Half X has a one-of-a-kind 3-D sculpted metal frame that holds the open-edge lens in place securely, giving a clear downward view that's perfect for cyclists, rowers or any athlete who needs downward vision. What's more, the lenses themselves have a special Hydrophobic coating that shields against water, skin oils and lotions. They're also designed to optimize clarity, reduce glare and block out 100% of harmful UV rays.