"These are Interchangeable from goggles to sunglasses! 3 sets of lenses also included! Sleek frames! These come with 3 sets of interchangeable one piece lenses- Smoked, Yellow, and Clear. Shatterproof, polycarbonate, UV400 protection! Comfortable rubber nosepiece and comes with a belt case. Includes RX insert: take it to your eye doctor to fill the prescription. This metal insert pops right in behind the polycarbonate lens so you can use all three sets of colored lenses with your prescription insert. BIRDZ, a leader in US motorsport eyewear, has a reputation for providing durable, attractive, and affordable eye protection. Very few manufacturers can match the quality, protection, or price. The inside of the frame is padded for maximum comfort even after long periods of use. The strap is made with silicone for non slip use on helmets. Frame is top, bottom and side vented to help prevent fogging. This product will ship with a set of 3 lenses: smoked, yellow, and clear. Tailor your eyewear to your particular style. All lenses are shatterproof, polycarbonate, Anti-fog coated, UV400 rated. Changing the Lenses: Slide the nosepiece off the lenses first. Then, take one end of the lens in your right hand and the frame in your left hand. Holding the frame vertically, firmly tug the lens down while pushing the frame up. You will have to bend the frame and lens slightly to get the lens out. Pop out the middle portion and then do t-he same with the other side lens. To Replace the lenses: Put each side of the lens in first, then snap in the middle portion lastly- you may have to slightly bow/bend the lens again. Finally, replace the nosepiece on the glasses. "