The US military coyote ACH and ECH improved H nape retention system is a helmet suspension and chin strap assembly designed to secure the helmet during movement and impact. It improves stability, comfort, and fit compared to earlier retention systems.

• Color: Coyote brown
• Material: Nylon webbing with metal and polymer hardware
• Compatibility: Advanced Combat Helmet (ACH) and Enhanced Combat Helmet (ECH)
• Design: Improved H nape configuration with adjustable chin cup

Issued to U.S. military personnel as an upgraded helmet retention system to enhance helmet stability and retention during operational use.