 Members of SCP-799 vary in size, shape, and superficial appearance, but always retain the appearance of a knit or woven item of bedding. The items are living organisms, most similar in physiology and structure to data expunged. Although alternate hypotheses suggest fungal origins, full notes may be found in Document 799-1A. They are apparently cold-blooded, hence their adaptation for use by intelligent homeotherms. Instances of SCP-799 are usually torpid and incapable of movement, requiring little nutrition. What they do need, they draw from the organic detritus present in household dust. One specimen is believed to have survived for years on end stored in a damp, ill-maintained attic, living on heat from the house below, and detritus from the wooden rafters above.