The use of skin-friendly flannel hot sealing high-density sponge, soft and comfortable to wear, cushion the impact of the helmet on the head during impact, suitable for a variety of tactical bulletproof helmets, can also be installed in various helmets to make the helmet more comfortable. The adjusting belt of the head hoop is made of polyamide nylon material with strong tensile strength, the hanging belt is made of high-quality polyester webbed tape, the adjusting buckle is made of nylon material, the external screw of the regulator is made of 304 stainless steel material, which will not oxidize and rust after long-term use, the adjusting knob is made of poly, and the lower forehead belt is sewn with suede leather material. Both sides of the suspension and the rear swing to the head of the use of black velvet, but not easy to break. The side rail is made of engineering materials with high strength and durability. The elastic hook is made of new latex elastic rope with good durability. The hook is made of steel electroplating anti-rust treatment, and the joint of the hook and elastic rope is made of UL certified heat shrink tube heat shrink protection link. The NVG Shroud is made of aluminum alloy metal material, and the special screws and nuts are treated with steel rust prevention. Featuring an engineered polymer outer housing with lightweight, aircraft grade aluminum interface insert, Armor's NVG Shroud weighs just 36 grams. Common tri-hole attachment with stainless mounting screws Design provides maximum strength at the interface with NVG Bracket Secure locking technology provides optimal fit and retention Can be utilized for mounting head borne devices such as night vision, illumination and cameras. Snag free, low profile. Fits ACH/MICH/PASGT ballistic helmet geometries.