Gel filled heat pads. How do they work?

[AndyKH]

Ok, i have some of those gel heat pads with the little metal disks. After activating them yesterday i started wondering how they work? Does anyone know as i'm very intrigued.

[AndyKH]

Brilliant, thankyou.

[AndyKH]

anonymous said:

[redacted]

[AndyKH]

Erm no, my O/H has a bad back and wanted to place the heat pads on the muscle.