Delta Retention System Safariland introduces the Safariland Retention System that is compatible with all sizes of our Delta ACH helmets. This system is made up of a lightweight Polyamide build with a leather-lined chinstrap for all-day comfortable fit. Hardened injection molded plastic buckles provide a secure fit and one-handed adjustability. The dial-ratchet mechanism helps evenly distribute weight and the high-performance foam padding offers enhanced comfort for the head. Available in Black, Coyote Brown and Tactical Green. RPS (React Padding System) Helmet Liner Safariland introduces the RPS® Helmet Liner that is compatible with all sizes of our Delta ACH helmets as well Safariland TCI under helmet and rail mounted Communication Systems. This liner takes protection and performance to a whole new level exceeding ACH blunt impact requirement (AR/PD 10-02). The RPS™ is lightweight, customizable, and provides increased mobility for the operators. In addition, the system contains anti-microbial materials with moisture absorbent properties and a VELCRO® brand hook disk retention.