Duty Exoskeleton

The most blinged-out type of body armor in S.T.A.L.K.E.R., the Exoskeleton provides supreme protection against small arms (against hazardous environments not so much, SSP-99M shines there) and improves the weight-carrying capabilities. Originally you cannot run in it, but mods (and an upgrade in Call of Pripyat) fix that.
This certain exoskeleton has Duty paint scheme. "Duty" (a.k.a. "Dolg") is a stalker organization that seeks to destroy the Zone so its dangers won't spread to the outer world. They have militaristic hierarchy and discipline, and favor heavy body armor; typically they choose weapons of Soviet origin such as AN-94, OTs-14 or AS "Val" and overall prefer heavy weapons such as PKM light machine guns or RPGs. Their main enemy - beside Zone's typical dangers - are "Freedom", the stalker organization that aims to research the Zone and use its wonders to humanity's good (and is the polar opposite of "Duty")