Ghillie Suit

A ghillie suit is a type of clothing worn by hunters and military snipers. Looking more like dense foliage than an actual article of clothing, it is designed to break up the wearers distinguished outline against his surroundings. Most suits are created before the mission with cloth and twine, to look like leaves and twigs, but many marksmen are trained to weave improvised items found in the field into their suit.

In Call of Duty 4 campaign, the suit is worn on Lt. Price and Cpt. MacMillan during the missions All Ghillied Up and One Shot, One Kill. In multiplayer it is worn on players using sniper rifles in certain maps, most notably Overgrown and Downpour, where crouching in the right spot can make you virtually invisible.