Four Hong Kong records were smashed at the International Open Championships at Kowloon Park Swimming Pool, thanks to hi-tech swimsuits.
Technological wizardry helped swimmers shatter many world records at the world aquatics championships in Rome last month.
The swimsuits will be banned at all international competitions after December.
But many local students depended on the ultra-modern techniques to improve their performances over the weekend.
Form Five student Lum Ching-tat - one of the record breakers - was wearing his new weapon, the Arena X-Glide. But he was unhappy after damaging his HK$6,000 swimsuit which helped him set a 50-metre freestyle record of 23.1 seconds.
'My heart ached when I noticed a hole in my swimsuit after using it in the competition just once. It cannot be used again,' he said. 'The swimsuit was really expensive. Also, it took me lots of time and energy to put on and take off. My coach helped me put it on, which took about an hour.'
Ching-tat said the new swimsuit helped him psychologically.