Everything about the 3D OTIS is new, with one innovation after another. Introducing a completely new lens and clasp system that is the quickest and easiest lens changing system in our collection. This CONVERTIBLE LENS TECHNOLOGY eliminates the annoying fumbling associated with lens changes. The three point Click In'n'Lock system allows for lightning fast lens swaps. 3DOTIS models are the first goggles to add an integrated 3mm MAP PROTECTION layer to the extremely soft, triple layer Xdry face foam. The flexible MAP layer molds itself perfectly to the shape of the face, ensuring that the goggles sit just right. This goggle has a large fit.