TYR Nest Pro Goggles Made using the highest quality materials Tested to give you the edge in all your activities Used by both professional and recreational users 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 Polycarbonate (PC) lenses feature imbedded anti-fog properties and are UV protected Soft TPR gaskets for comfortable, water-tight fit