Future Market Insights analysis indicates that the phase change microencapsulated (PCM) thermoregulating fiber category is undergoing a structural pivot from apparel-led comfort positioning to passive thermal infrastructure demand. Decarbonisation pressure is converting thermoregulation into an energy and compliance variable, pulling PCM into EV cabin efficiency, battery-adjacent textile liners, and long-cycle bedding systems where durability proof and supply assurance now influence sourcing decisions.