MSA's new ACH delivers an advanced ballistic and impact head protection to Law Enforcement users, with unsurpassed comfort for long-term use. The helmet's low-profile design reduces the risk of interference in target acquisition and ensures compatibility with NVGs, MSA's Millennium CBRN (Chemical, Biological, Radiological, ' Nuclear) Gas Masks, and MSA's battle-proven MICH Communication System. Customized sizing and helmet comfort are largely due to a suspension system of movable comfort pads (attached to Velcro disks on the inside of the helmet). The sized pads conform to the shape of an officer's head to distribute the helmet's weight evenly. The ACH is available in black or green in two helmet sizes.