Jacket Armor

In Quake 2, Jacket Armor (also can be called the Flak Jacket) absorbs 30% of an attack and gives you 25 armor points, with a max of 50 points. It offers no protection or absorbtion against energy type weapons like BFG, Hyperblaster and Blaster. Jacket Armor is the weakest type of armor in the game, but should be picked up because it gives you protection against conventional weapons even at the slightest. It is Quake 2's equivalent of the Green Armor found in Quake 1.

Single Player
In single player, Jacket Armor is the most common type of armor in the game until you get out of the Factory hub. Early in the game, it provides good protection against the weak Guards and Enforcers, but it doesn't cut it against Gunners, Gladiators and Tanks.

Multiplayer
While the Jacket Armor has a low absorption percent, it will protect you from getting killed by a Railgun in one shot, so grab it as soon as you see it. It's better than nothing. Since it offers no protection against energy weapons, anyone spamming Blaster at you must be avoided.