This is the ESS Profile NVG Goggle in Black with the Stealth Sleeve. The ESS Stealth Sleeve is designed to cover the goggle when it is stowed on a headgear, preventing reflection or glint off the lens and helping to keep the goggles clean and the lenses scratch-free.
Black with Stealth Sleeve Part No: EP01BK1TSB
NSN: 4240-01-504-6222