Based off the design of our very first pair of shades we dropped as a company. The Delta shades are making a comeback and they are better than ever. With a new light weight Memory Shape TR90 frame and Z87 rated polarized lenses. If you have a big head these frames are meant to stretch to fit without feeling too snug. Whether you are on the jobsite or chillin at the beach these shades are next level with it comes to style and comfort.