Cocoonit
Cocoonit is a term that refers to a protective or insulating layer, often formed naturally or artificially around an object or organism. The most common usage of cocoonit relates to the pupal stage of insects, where a larva spins a silken casing around itself for protection during metamorphosis. This silken cocoon serves as a barrier against predators, environmental changes, and physical damage. The material of the cocoonit can vary, but silk is prevalent among moths and some other insects.
Beyond its entomological context, cocoonit can be used metaphorically to describe any insulating or protective covering.