Many stalkers wonder about the origin of the Murmur equipment. Some believe the nature of this armor suit might provide answers to all questions. Although the armor superficially retains a distant resemblance to the usual ZIVCAS product, the 2A structural features remain in place, while most modifications focus on life support systems and armor elements. For most stalkers, both the unknown technologies and materials used in modifying the equipment remain a mystery, and scientists often do not dare to voice speculations.