FMA 4 Points Tactical Helmet Accessories Retention System Chin Strap with Bolts and Screws for MICH ACH Fast IBH Helmet, Black Tan Makes helmet 3x more stable under rotational forces One-handed, on-the-fly strap adjustment with no loose ends Padded protective leather chin cup and nape pad Adjustable buckle on the strap allow adjusting the tightness with one hand Special nylon design with air permeability and durability