The Lens Guard is a padded cover that fits snugly over the end of the lens to protect lenses and filters and help avoid costly trips to the repair shop. Its cushiony, water-resistant inner core is made of 0.25" (6mm) thick closed-cell neoprene (diving suit material) and is encased in a tough 0.08" (2mm) santoprene outer cover. This powerful combination absorbs impact and prevents scrapes, scratches, dents and cracks to lenses. It is like the bumper of a car, providing more protection than lens caps, filters, and hoods. It is lightweight, too, with the largest Lens Guard just 2.4 ounces. A tether can be attached to the lens or strap to keep the Lens Guard handy. Made and assembled in the USA.