To ask my dh to not ever wear this jacket? I am scared it will self com-bust!

[PureQuintessence]

He has wired his coat with heated wires, and will connect it to his motorbike.

It is madness, right?

Yes, the pre-made ones (which are tested etc) are ok - however this guy has made this himself, and is wiring it into the electrical system on the bike himself...

That's a modification.

I could use one of those for the school run!

Santa brought one of these for me at Christmas, for the playground!

Your DH may think he's McGyver though. Be thankful he's not wearing Lycra... Yet!