Abstract: Apparatus and associated methods relate to a stretchable cover assembly permeable to electromagnetic signals formed within an enclosed device envelope to increase the resilience of the actuator body envelope against high-pressure fluid. In an illustrative example, a cover assembly is configured to encapsulate an electronic device. For example, the cover assembly may include a unitary envelope formed from a translucent, radio permissive, and ultraviolet light reflective material. An internal cavity defined by the unitary envelope may repeatedly receive substantially an entire exposed surface of the electronic device. The cover assembly may include an elastic opening that, in a relaxed state, the elastic opening is configured to be sealingly pressed against the enclosed electronic device forming a seal around the entire elastic opening to form a dust-tight and watertight cover.