 SCP-600 is a humanoid entity, with a build approximating an adult human male of average weight for its height. The subject is generally featureless, lacking facial features, external ears, body hair, genitalia, and anus. Full body scans have shown SCP-600 to have no internal structures of any kind, instead being formed from an unknown material of uniform density, close to that of human muscle tissue. It neither ingests, respirates, nor excretes. The subject's age has not been determined. SCP-600 telepathically affects all humans who view it, causing it to take on their superficial personal characteristics.