Mypads foil

“Mypads” brand sax pads have foil lining?

I always assumed that “Mypads” pads were cheap pads.  I accidentally tore one when removing it and it turns out they have a foil lining under the leather.  Not sure of the purpose and whether it is a good or bad thing.

Mypads foil

Mypads foil

Mypads foil

Mypads foil