The Oregon Aero BLSS Kit (Ballistic Liner and Suspension System) improves the use of military PASGT and RBR helmets. The BLSS Kit includes seven highly engineered pads, four-point chin strap/harness retention system and integrated nape pad that are installed as an upgrade without the need for helmet modifications. The BLSS Kit creates a painless, safer, stable, and positively buoyant helmet and reduces sound reverberation. The pads also are waterproof, air permeable and self-wicking.