BEST FOR: CYCLING

Fold back the left arm and flip the temple hinge to swap out the RadarLock's lenses – a quick, simple task. This updated system locks the lens (pick one of eight lenses) in place without distorting optics. In fact, the downward view of the frames granted us a remarkable field of vision as we navigated twisting roads and trails. And the arms fit snugly without clamping, so the shades feel comfortable even on hour six of a ride. [$220; oakley.com]