IT'S the $60 bracelet they tell you has the potential to make ordinary men into super human. So just imagine what it does for superstars such as Wests Tigers pivot Benji Marshall.

The NRL has confirmed it will investigate the use of Power Balance wrist bands after Marshall last week exposed one of world sport's best-kept secrets.

As he lifted his arm in triumph, Marshall revealed he was wearing the Power Band during his man-of-the-match performance against the Sydney Roosters at the SFS.

It is claimed the wonder band can increase an athlete's core strength and power by as much as 500 per cent.

And as The Sunday Telegraph began investigating the mystery band on Marshall's wrist, we discovered he is not the only athlete using it. Parramatta's Timana Tahu and Eric Grothe, St George Illawarra's Matt Cooper and Bulldogs half Brett Kimmorley were also said to be fans of the bracelet.

Kiwi teenage sensation Sarah Mason upset world champion Steph Gilmore to set up an all-Kiwi quarterfinal against Paige Hareb in the Dream Tour women's surfing event in Taranaki today.

After Hareb had been clinical in disposing of her 2010 nemesis, Australian Rebecca Woods, in the third heat of the morning, Mason left it late to blitz Gilmore in tricky conditions at New Plymouth's Fitzroy Beach.

The 15-year-old was well behind after Gilmore had posted an early ride of 8.33 and the Aussie backed that up with a 5.33 to give her a commanding lead.