Scopecoat Holographic & Electronic Optics Black Neoprene/Nylon Laminate SENTRY manufactures Scopecoats designed specifically to protect your illuminated optics. Made from our standard 3mm thick Neoprene/Nylon laminate composition that assists in repelling moisture, dirt, debris and condensation away from your optic. This combination helps to protect your optics from the elements and damage while storing or transporting your gear.