A creepy gravitational artifact nicknamed "Mug" by stalkers for its resemblance to a human face.\n\nScientists at Research Institute 7 have long tried to determine its composition and structure, but have not reached a consensus. Although all Mug samples look almost identical, they may actually be composed of different debris.\n\nStalkers have noted another feature: two blinking diodes that sync to the bearer's heartbeat. Such similarity of this artifact to the Heart has spawned many tales among the Zone's inhabitants.
Effects
| Explosion protection | +10.79 – +12.7 |
| Biological infection | -1.28 – -1.09 |
| Radiation | +0.531 – +0.625 |
| Vitality | 1.02% – 1.2% |
| Carry weight | +3.23 – +3.8 |