The Scientific EXP-4 is a protective suit which was planned to appear in S.T.A.L.K.E.R.: Shadow of Chernobyl.
A red-colored S.C.A.P.E suit with an airtight helmet. It was supposed to protect the wearer from fire, acid, toxic gas, various anomalies, including Burnt Fuzz and physical damage. 
The suit is mentioned in the Special Edition of S.T.A.L.K.E.R. Zone Survival Guide.
- ↑ string_table_enc_equipment.xml; id=Sci2
- ↑ string_table_enc_equipment.xml; id=enc_equipment_armors_sci2