Originally developed for the U.S. Army Special Operations MICH helmet, the Oregon Aero BLSS Kit (Ballistic Liner and Suspension System) has been modified to upgrade virtually any ballistic helmet with a four-bolt harness configuration. The BLSS Kit Model 45 extends the benefits of improved impact protection, comfort and stability to more helmets than ever before. The BLSS Kit Model 45 consists of seven highly engineered helmet liner pads and features a new four-point chin strap and integrated nape pad harness system. The harness system design is the key to accommodating more helmet models.