Nike eyewear is renowned for being bang on trend, seriously sporty, and completely and utterly 100% unique. All that is, except for this pair. You see, the 8160 has a twin. Not identical, but pretty darn close. Both the 5017 and 5317 versions have a semi-rimless metal frame in gunmetal grey and two-tone blue and aqua arms that are smooth and straight and striking. The 5017 is the baby of the bunch, with a smaller frame and narrower lenses. These are perfect for faces with delicate features.