I was wondering the same thing - Friction between material layers with movement + an very low loss insulation layer would qualify as &quot;self heating&quot;...kinda.<p>I&#x27;m more interested in the SolarCore AeroGel they created, and its actual insulation properties when compared to pure &quot;Legacy Aerogel&quot; - I&#x27;d imagine incorporating it into a fabric like substance would significantly decrease its insulating ability