Personnel Armor System for Ground Troops (PASGT) was originally type-classified in the late 1970's and first fielded in early 1980's.
The PASGT body armor vest is intended for use by ground troops for protection against low velocity projectiles and grenade fragments.
The PASGT helmet is intended for use by ground troops and parachutists to provide ballistic protection from fragmenting munitions to the head, temples, ears, and neck.