Interchangeable goggles/sunglasses with 3 sets of lenses! Shatterproof, polycarbonate lenses that provide 100% UV Protection. ANTI-FOG coating on ALL 3 sets of lenses (some manufacturers out there say their lenses are anti-fog but only one set has the coating- ALL THREE sets of ours have the anti-fog coating!) Three Lenses: DAY (Smoke Mirrored), OVERCAST OR DUSK (Yellow), NIGHT (Clear). The Phoenix also has an optional prescription lens (RX) insert (frame) available that you can take to your own eye doctor- see below. Matte black colored frames, inside of the frame is foam covered for comfort and durability. Comes with sunglass arms and an adjustable strap to wear either as glasses or goggles! Our Birdz belt case also included to keep them in. Very easy to change lenses, single lens pieces!