Product Show Product Description Hidden Transparents lens Product Details dried cuttlefish Multi-function device adapter base(dried cuttlefish) Rail connection system Helmet rails can carry adapters and other equipment (such as headlights, flashlights, communication equipment, masks and other accessories) 3:Velcro design Velcro design The velcro can be equipped with accessories such as IR badge, morale badge etc, according to requirements, Multi-angle velcro sticks the accessories where you need to mark Ventilation hole design Ventilation holes are designed to allow flow into the gap between the helmet and the head durig exercies to maintain good ventilation Cushion design The internal design of detachable protective cushions allows the helmet to fit the user's head shape and fit comfortably Adjustable helmet strap Put on the helmet and adjust the helmet strap so that the length of the helmet strap fits the face of the user,as long as it is worn correctly, the product and the head will not move Product Color