Golf pros may tell you that success is all in your head, but an Australian inventor believes what is on your head can be just as important.

Roy Halle, a 55-year-old mechanical engineer from Sydney, found the wind was blowing his hat off when he was golfing, so he attached some solder wire to it to weigh it down.

He found to his surprise that not only did this keep his hat on his head - it also appeared to improve his swing.

Would Tiger Woods would be happier with the Inertia Golf Hat?

It is important to keep the head as still as possible when swinging a golf club.

Mr Halle says that his hat reduces head movement - the bigger the hat, the more dramatic the effect.

He claims that his own handicap dropped from 14 to 9 in a year.

Mr Halle has filed a 30 page patent application with the World Intellectual Property Organization in Geneva and formed the Stability Golf Company.

His Inertia Golf Hats sell for 40 Australian dollars apiece.

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