The skin of the chloridrine is standard cis-1,4-polyisoprene rubber with a small amount of synthetic ultramarine pigment (specifically a version containing chloride in its crystal matrix). As with other strangers, there appears to be no traditionally physical way for the entity to move, as it lacks contractile molecules and any semblance of metabolism. Its internal cavity is full of water. Our tests have found that this water is sourced (somehow) from any rain that falls above the chloridrine, and may contain particulates of material found on the roof and gutters of the building within which the stranger resides. It adds high concentrations of chlorine to the mix, unsurprisingly. The “eye bolts” are composed of polyvinyl chloride with carbon pigment.