I lived in Rio for years; there is currently a (quite unfortunate) American-copying trend amongst the statua-conscience rich people in neighborhoods by the beach like Leblon and Ipanema. Most of the rest of Brazil still wear the sunga style though. Most of the sungas I acquired were made of less stretchy fabrics and seemed to be optimized for sports on the beach (volei, futbol etc. Etc.) moreso than swimming. The cut is a little higher on the leg than most square cuts; those with very meaty thighs might find the leg holes dig in a bit. The tight fit on the leg holes makes them great for running though