Wind Deflecter for Soft Top

[Rippers]

Hi all

The sun has finally arrived in our neck of the woods, but the early morning/late evening commutes over the Pennines are still far from warm. I have been told that I can get a wind deflecter for my Cooper S cab which fits behind the front seats and will make the car much less breezy when the roof is down. My question is...

... do they work...

... and if so how much will it cost to buy one from a dealer?

Any help greatly appreciated

Cheers - Rippers

[Rippers]

Perhaps a scarf would be a better and more cost effective purchase!