Four self-locating magnets assist in lightning-fast lens replacement and four snap pins keep the lens securely locked in place. The fit accommodates a wide range of female faces while boasting an impressively wide EXV field of view. The Ella includes two of the best lenses in the business with premium VIVID lenses with Optics by ZEISS®, EVAK Vent Technology and anti-fog coating to keep moisture in check, and triple layer face foam and fleece. All these components make Ella so comfortable you'll never want to take it off.