It is a cleaning tool of the hand or body variety, it is relatively clean in appearance.
- Found on a sink inside the ArcJet Systems building.
- Found in a bathroom, next to some showers inside of Fort Hagen.
- Three can be found in the sleeping quarters of the Sentinel site, after a long walkway full of feral ghouls.
- One lies on the ground right next to the Deathclaw in the Old Gullet sinkhole.
- One can be found inside a restroom within the sublevels of Fort Strong. (Go down the elevator and when seeing the sign saying "restroom" go in there and the soap will be right in front.)
- One lies in one of the rooms of the mayor's office in Diamond City.
- One is located on the 3rd floor in the warehouse on the left of the three warehouses in Goodneighbor.
- A dozen or so can be found inside a wooden box inside the locked employees-only area of Charlestown laundry.