Fuse’s very first customer was a firefighter. We owe a lot to the hardworking men and women across the nation. Thin Red Line was created to show support and solidarity for them. The collection features our best-selling frames with red details that mimic the symbolic Thin Red Line flag. These frames are both lightweight and sporty with rubber grips that help these shades stay in place all day long. A portion of every Thin Red Line sunglasses sale benefits Firefighter Cancer Support Network.