Mahe Drysdale was wearing one when he won his Olympic gold medal in London and now the Wanganui inventor of the possum belt is on the verge of going into full production and pitching sales worldwide.
The belt has been invented by Wanganui deer farming identity Colin Cox.
Mr Cox is regarded as one of the pioneers in deer farming and the possum clothing industry but he reckons this is his "greatest accomplishment" because of its health benefits.
And the belt, which positions a band of possum fur against the wearer's body, has been given the thumbs up from one of the world's greatest single scullers.
"I've tried braces, magnets, deer velvet and health tonics of all descriptions but nothing has worked," said Drysdale, who has arthritis of the lower back.
Mr Cox said the rower was sceptical of the belt but agreed to try it.
"A couple of weeks later Mahe phoned asking if he could move the velcro connector around to one side so it wouldn't interfere with his rowing action," he said.
"He went on to wear the possum belt nearly every day for the next year-and-a-half, winning the world singles title and later the Olympic gold."
The history of the belt goes back to the mid-1990s when Colin and his brother Bo Cox, together with the late Sir Peter Elworthy, were pioneering the possum clothing industry.
On a visit to Japan, Sir Peter learned scientists had discovered possum fur had the same thermal qualities as polar bear fur.
Then in one of those "Eureka!" moments, Mr Cox had some seat covers made from possum pelts and after using one at a lengthy meeting noticed some pain relief in his lower back.
Taking testing a step further he made a possum pad to fit his lower back area, tied it around himself and hopped into a cold bath.
"At first the cold was intense but in a very short time my lower back started to warm up. It was enough to convince me we were on to something," he said.
For the next two years Mr Cox and his wife Bev trialled the possum belt and found that the fur "breathed", taking away moisture and perspiration from the skin as it did so. "With wool and other fibres, moisture sat on the tips of the fibres and leaving you hot, cold or clammy depending on the exertion. But possum fur seems to arrive at blood heat and then turn off like a thermostat," he said.
The biggest problem was finding the right material to bind the possum pad around the lower body and it was another two years before material used in mountaineering clothing was found.
Five years of trial and error later and the Coxs were satisfied with their product.
The next challenge was getting the message across. Mr Cox didn't like the idea of using some sporting personality simply because they were famous. He wanted the genuine article, someone still participating and suffering from back problems.
The answer came at a social event at a city bowling club when a former rower suggested they contact Drysdale.
Mr Cox said he was thankful for the countless hours clothing machinists Peter and Pat Gilbert had put in nutting out problems sowing the belt.
Meanwhile, staff at UCOL campus in Wanganui were working on a couple of minor alterations to the belt before full scale production and international marketing began.
Mr Cox was negotiating production details with Bary Knitwear in Marton and those should be finalised very soon.