Aero-Gel is the lightest man-made insulation, as far as I know. Are there different types of Aero-Gel? i.e., some more rigid, some very flexibe that will regain loft after compression, etc.
I ask because I wonder why it has never been used in winter boot insulation even if it has very little "rebound" after compression. Suerly it could be used in a toe box and heel area where it will not be compressed due to the rigid structures in those areas.
My dream use of Aero-Gels is in a self inflating mattress like a Thermarest Prolite, (at least in the foam void areas) for extending it into shoulder season use.
Or am I wishing for too much? Is Aero-Gel like Never Wet, just a backpacker's wet dream that won't make it to market?