TYR Hydrovision Water Sports Mask Hydrovision Swim mask is perfect for those swimmers who do not want to wear goggles or prefer a larger frame structure that does not sit inside the eye sockets Larger lens design provides maximum visibility and provides universal one-size fits all fit to adult men and women as well as youths and includes a nylon mesh pouch for storage and lens protection Unibody optical grade Polycarbonate lenses are UV and anti-fog protected and gasket skirt is soft hypoallergenic silicone for watertight fit and split silicone headstrap is grooved to ensure secure fit Designed for masters swimmers triathletes fitness swimmers open-water swimmers and recreational swimmers