Board shorts are a popular choice for swimwear, whether you plan to hit the waves or not. They're typically made from a combination of cotton and Lycra and have a tie in the front over a hook-and-loop closure. Since there is no elastic in the waistband, it's important to get a good fit when you purchase board shorts. Wear a tight-fitting pair of underwear when trying on board shorts to ensure the proper size. If the string comes out, it's easy to put it back in.
Place one end of the string into each of the board shorts' bottom holes. Pull the string tight, making sure the two sides of the string are even.
Put the left end of the string into the nert right hole from back to front.
Put the right end of the string into the next left hole from back to front.
Repeat steps two and three if there are additional holes. (Most pairs of board shorts only have four holes.)
Tie the string as though you are tying your shoes.