Swim Systems Convertible Boyshort Swimsuit Brief A250 Swim Systems Convetible Boyshort Swimsuit Brief A250. Swim Systems has created swimwear for the contemporary and stylish woman. Beautiful prints. Just divine! This great boyshort offers coverage and comfort. Banded boyshort can be worn as is to help hide those little imperfections or can be folded down to show off your fabulous curves. Boyshorts are a great way to enhance or even add little more curves. Match it up with your favorite Swim Systems swimsuit top and have a blast in the sun.