Weight: 900g Built-in fan system: adjustable Product size: 7.7 "* 11.4" * 12.7 "CM Color: OBSIDIAN, Rock, Green Leprechaun, Terminator Material: WosporT helmet made of high polymer material has reliable corrosion resistance and deformation resistance. Side rails fit a variety of tactical accessories Integrated NVG mounting points compatible with most GoPro NVG style mounts (excluding NVG mounts) Strong enough crystal goggles to protect the airsoft gun Resistance: The helmet's impact resistance is more than 1000 FPS; 420 FPS lens has a point impact; is it unclear whether the data of surface or blunt object vibration? Package Included: 1x main helmet 1 NVG shroud 1 x x lining (with Velcro) 1 set x external accessories (hexagonal screws * 34) 1 x screw set (Hexagon socket screw * 20; stainless steel screw * 5; NVG shield screw * 3; hexagon socket screwdriver * 1)