The new Cressi Big Eyes Evolution Crystal Clear Silicone concept is a truly revolutionary and exclusive introduction in diving mask technology. The Crystal silicone offers a degree of clarity never seen before in scuba diving masks, and the 100% hypoallergenic skirt material becomes completely transparent when worn. Cressi's exclusive skirt material is incredibly soft, comfortable, and resistant to discoloration. And, optical lenses to correct for nearsightedness can be installed by Cressi authorized retailers, and are available in increments of .5 up to a strength of -6.0. For more information www.cressi.com