Simply rotate the temples to open and close the frame for a quick swap of the 3 included lens sets.

Making interchangeable lenses easier than ever to swap in and out the Smith Interlock 01 Polarized Sunglasses introduce a new technology that opens and closes the frame with a simple twist of the temple. The Interlock 01 comes with three sets of distortion-free Carbonic lenses so you can achieve optimal optical clarity and comfort. This gives you incredible versatility whether fishing a mirror smooth lagoon with the polarized lens driving at dusk with the clear mirror lens or playing a game of tennis while benefiting from the vivid color definition of the sports specific Ignitor lens. The 8-base curve of these lenses is excellent for blocking peripheral exposure to glare dust and wind. Also of great benefit the Carbonic lens material offers amazing impact resistance 100% protection from all UVA B and C rays and scratch resistance that's built for the outdoor lifestyle. Hydrophilic Megol on the nose and temple pads keeps the Smith Interlock 01 Sunglass in place in the midst of fast-paced action. The Interlock 01 offers the best fit for those with small to medium head sizes.