Winter glove redesign... ideas wanted

i always thought someone could line clothing with this stuff in between layers of other fabric.

maybe i haven't seen it, but it apperas no one has done it yet. seems ideal for slimline heat retention e.g gloves.

The castelli radiantion jackets have something similar.

The foil part is a liner that you can remove. You used to be able to get a gilet in the same material. I was going to buy one (twas on sale) but could'nt see myself using it as an outer layer.

My previous suggestion of a flap over mitten section that was streatchy enough to cover either 3 or 4 fingers was nicked from here:

These look removable though. I was thinking of a flip back design. I could see myself the mitten part alot on quiter flatter roads, and then uncovering a gear shifting/braking finger when need be.

Slightly off topic, but I have TT style bar-end shifters on my winter bike. This partly due to the fact that they can be operated with mittens/lobster gloves on.