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. Note:...The picture with the smoke color lense has the Rx insert for the Feather2. You can order this Rx insert and you can take it to your eye doctors to fill your 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. _______________________ 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 the 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.