The A16.8 was a type of medium military armor used by various factions during and after the Great Galactic War

Great Galactic War Event Great Galactic War (3681BBY - 3653BBY)

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The basic kit, available in a variety of colors, consisted of pieces of medium armor covering the chest, back and lower legs. The advanced kit included a backpack and several additional elements of armor - shoulder shields, armor plates covering the chest and back of the wearer, as well as shin guards for boots. It was not uncommon to see someone wearing basic kit, but with a few pieces of advanced kit.
The GE20 A16.8

GE20 A16.8 Helmet Armor Helmet

, one of the GE20-series helmets, was designed specifically to be worn with this armor.