Where/When: 1198 Madison Avenue (at 87th St). July 26-Aug 5th; Mon-Thurs (10-7p), Fri-Sat (10-6p), sun (Noon-5p). (via)
You might have to fight off a horde of bleached blonde yoga moms to get at the shoes at this UES sale, but if you want the shoes at a reasonable price, go for it.
The thongs above usually retail for $100ish, so the 80% off makes them a more reasonable amount to spend on flip flops.
Personally I hate the look of these shoes and the oversized stitching and the clear "look, I wear flip flops but they are designer" message of them. But people say they are really comfortable so whatev.