The G-string was a revelation in women's underwear. Will it be the same for the intriguing U-shorts, which have been prominently displayed on cheeky posters around town? Designed by Japanese garment manufacturer Wacoal, U-shorts intend to make fashionable the once-reviled brickie's cleavage or builder's bum, a disturbing phenomenon formerly confined to construction sites. Apparently, exposed bottom cheeks are desirable given the trend in women's fashion for low-slung hipster pants - well, more desirable than underwear visibly riding high. U-shorts are cut low at the back and come in four depths so you can determine how low you go. Wacoal's sales and promotion department supervisor, Alice Huie, said they were made from form-fitting Lycra so the wearer didn't experience a 'falling down' sensation. SAR (we're not saying which one of us!) decided to road-test the $45 knickers. After a day in low-waisted jeans and the 11-centimetre model (that's measured from the gusset up), we can report high scores for comfort and fit. But while they passed the waistband test, the U-shorts fell down when it came to that other pant problem, the dreaded VPL (visible panty line). Think we're going to have to do a U-turn and stick with the G-string.