You must wear tight fitted clothing to complete the test, natural fibers (e.g. cotton) will interfere with results. Nylon, spandex or lycra material is suggested. Women: compression shorts and a tight-fitting sports bra or bathing suit (no underwire or metal). Men: compression shorts or speedo. If you have a swimming cap, you may bring it. If you do not, the staff will provide you with one (you will stay dry!).