Maybe Mary Kate-Olsen's flip-flops and sweatpants are a hard-left turn away from the sardine prints and cable-knit sweaters otherwise associated with a beachside retreat.

Maybe Mary Kate-Olsen's flip-flops and sweatpants are a hard-left turn away from the sardine prints and cable-knit sweaters otherwise associated with a beachside retreat.

Minimalist, ultra-luxe brand The Row, founded by the ever-chic Mary-Kate and Ashley Olsen, recently debuted a pair of $690 rubber flip-flops, which has caused a stir among style savants.