PT A-Bravo 6 Pt Chin Strap. The first six point water proof chin strap made with Quick Ditch chin cup for quick removal of helmet. PT A-Bravo Helmet will float to surface by removing chin cup underwater. Tough Nylon 500lb break strength. Accommodates MBU12P Oxygen Mask, Divator Mask, and NATO Masks. Non-Fabric Nape Pad does not break down in salt water. Non rusting Black Zinc Phillips Bolts/Nuts. The first and only complete field strip chin strap that can be repaired and accept larger chin cups and all oxygen/water masks. MADE IN USA.