It's a mere Shadow of a Mask; Lightweight and low volume, with a soft, comfortable, hypoallergenic black or clear liquid-silicone skirt. Because there is no frame, the Shadow's single lens sits close to the face, offering an unusually wide field of view. Also, because there is no frame, the mask folds into a neat package small enough to slip into a BC pocket, making it an easy to carry as a back-up. The black silicone skirt eliminates light coming in from the sides, which means the Shadow is an excellent mask for hunters and photographers who need to see, well, in the shadows. The clear version will satisfy those who prefer the translucent transmission of light into the mask.