Composite plates provide maximum protection from small arms fire.
― In-game description
The Flash drive with data on reinforced army body armor is a mission item in S.T.A.L.K.E.R.: Clear Sky.
General information[]
The flash drive contains upgrade data for a SEVA suit and can be delivered to Limpid in the Bandits base at the Garbage for a reward of 12 500 RU, after which he will be able to apply the upgrade to the player's suits.
Location[]

Location
The flash drive can be found laying on the ground next to Fang's PDA, right after the cutscene where two bandits ambush the player in the underground room below the Flea Market.