Originally Posted by badger_biker

Pardon my ignorance but for caliper brakes isn't it the heat build up of the rim that is the problem and not the pad? I'm thinking hot pads would throw a very minimal extra amount of heat to the rim than what the friction would be creating.

That being said they are 'cool' looking and I can see the benefit of pad cooling when you are dealing with hydraulic fluid that is in close contact with the pads.