During the winter it gets cold here, but of course the cold don't stop us Roadster drivers from letting the top down! The heater helps, but I wanted hot air around my face area and neck.
I made a tube that connects to the AC duct and connects on my seatbelt. It blows hot air into my face or pretty much where ever I want it.

Connected on a custom made seatbelt pad my wife made, it can blow warm air at my face.

I made a strap that can hold the hose behind my head, blowing hot air on my neck and ear

Another great mod I have come up with that works amazingly! I stay nice and warm always in the winter driving my Roadster!