Four way stretch means one size fits most. 85% Nylon 15% Spandex. 85% Nylon 15% Spandex. This classic triangle swimsuit top is the one must have in a girl's bikini drawer. It looks good with any kind of swimsuit bottom or even cutoffs or a mini skirt. Make sure you have this top in several colors for any occasion. It matches some of the best thong and g string bottoms in the Microkini Collection.