US, 2006, F6 Personel Armour System for Ground Troops (PASGT) combat helmet, with Chocolate Chip camouflage cover.
 
Size: Large
 
The Personnel Armor System for Ground Troops Helmet is a combat helmet first employed by the U.S. military in 1983 and eventually adopted by many other military and law enforcement agencies internationally. The shell is made from 19 layers of Kevlar, a ballistic aramid fabric and treated with a phenolic resin system.
 
The PASGT helmet was developed by the U.S. Army Soldier Systems Center after the Vietnam War during the mid-to-late 1970s. It completely replaced the steel M1 helmet in U.S. military service by the end of the 1980s.
It first saw use in combat in 1983 during Operation Urgent Fury in Grenada, and became standard issue for the U.S. military in 1985, and completely replaced the M1 helmet for frontline troops by the end of the decade. 
 
The PASGT the helmet was used during Operation Desert Storm and the subsequent Gulf War.
 
source: https://en.wikipedia.org/wiki/Personnel_Armor_System_for_Ground_Troops