Do you know there is an extremely good insulation

material that is 95% air?

It has the lowest known thermal conductivity of any solid.

It is silica aerogel with low density, light weight & unmatched insulating capability.

NASA uses it for cryogenic insulation for space shuttle and space exploration.

Crayons paced on top of a piece of silica aerogel will not melt in the flame of a blowtorch.

Aerogel provides 39 times more insulation than fiberglass.

Now used on earth in insoles to keep feet warm.

Toasty Feet Foot Warmer Insoles with Aerogel Insulation can be ordered on this website:

See details on page #5 (on left)