TYR's Technoflex(R) 4.0 technology involves a revolutionary dual injection manufacturing process. With the same great fit as the original Technoflex(R) goggle, the Technoflex(R) 4.0 Femme Goggle features gaskets that are injected with a softer durometer material to improve comfort and fit. The goggle also incorporates differing hardness densities of Thermo Plastic Rubber (TPR) as well as a stiffer durometer material to provide frame rigidity, which prevents nosebridge stretching.