This is a original Gentex Sound Protective Helmet-4 (SPH-4) modified with NVG double visor, both visors in exellent condition with minimal scratches, used by Army Helicopter Pilots and Rescue Crews, the SPH-4 had a shell made of fibreglass cloth layers bonded by epoxy, helmet is fitted with a sling suspension liner and had a nape and chin strap ,helmet with original NVG Mount and Battery Pack ,this size Regular helmet weighed ca. 1.54 kg (3.4 lbs), 24 inch straight cord with U-174 plug and military communications consisting of 5 ohm earphones and a microphone is present , helmet is in very good , flight used condition, Head for display is included in sale ,this helmet is flight used but in nice and very good condition ,note that all our items are pure collector items or display items. The items are not tested for real use and have no aeronautical exams or clearances. Use is at your own risk !