Introducing Flip-Up Tac Glasses; Flip-Up Tac Glasses are the newest in Bell and Howell Tactical eyewear with all the benefits of the original Tac Glasses, Light-Filtering technology. But with the ease to flip up, so you can read everywhere. Flip-Up Tac Glasses can be worn by themselves or over regular glasses and when you Flip them down, they snap right back into place. Features: Fits over existing eyewear. Flip out of the way and snap right back into place. Amazing light-filtering technology. L