The 3D+ OTIS highlights one innovation after another, including a 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. 3D+ OTIS models also add an integrated 3mm MAP PROTECTION layer to the extremely soft, triple-layer Xdry face foam. During a crash it absorbs impacts, protecting the sensitive areas around the eye sockets and cheekbones. The flexible MAP layer molds itself perfectly to the shape of the face, ensuring that the goggles sit just right.