Rug Bear Skin
Its physical representation is that of a beaten-up, dingy bear-skinned rug that you can practically smell if you try hard enough. Players standing on this item will receive 50% comfort and can regenerate health up to a point as a result, but if placed on the ceiling, standing beneath the head can result in 100% comfort.
A commonly overlooked aspect of the rug bear skin is its ability to adhere to almost any flat surface, including over single doorways, if done correctly. Rug types are commonly deployed in this fashion to mask or otherwise conceal aspects of a base that owners don’t wish outsiders to find.
In addition to players being able to tech tree this blueprint with the above-listed workbench, rug bear skins are also found in primitive crates and barrels or as loot drops from both dweller scientist types.