All done measuring your VO2 max? Good, now slide your feather-light Tifosi Podium Interchangeable Sunglasses on and head for the winner's circle. These performance shades were designed for people who live to perform and die by the details. The lenses swap out quickly, the optics are crystal clear right down to the decentered shape of the lenses, and the nose and stem pads grip your face even when wet. If you don't win, it won't be your sunglasses' fault.