*Polypropylene over-mold nest frame provides unique high-tech structure design. *Headstrap features patented Glide Clip system which allows easy on-head adjustment. *Double VTS (Varied Tensile Strength) silicone headstrap conforms to side of head while flat back straps allow for secure fit. *Wide peripheral Cellulose Propionate (CP) lenses feature imbedded anti-fog properties and are UV protected. *Soft TPR gaskets for comfortable, water-tight fit.