Why take half measures when you can bring it to completion? Don't strive for mediocrity or tolerate a work in progress. Go all the way in the Semi. It features molded rubber nose pads, base 8 spherical lenses, and a nylon grilamid frame.Designed in California, VZ offers a lifetime guarantee against manufacturer's defects. All VZ lenses provide 100% UVA and UVB protection, are distortion free, optically correct and shatter resistant.