To use this bikini bottom, simply slip it on like you would any regular swimsuit bottom. When choosing a size, remember to go 1 - 2 sizes up from your normal one for the best fit. As for maintenance, after each use, rinse it in cool water to get rid of salt, sand, or chlorine. Don't wring it out; instead, gently press out the excess water. Hang it to dry in a shaded area. Avoid using harsh detergents or bleach, as they can damage the fabric. With proper care, your Nick bikini bottom will stay in great shape for many beach days to come.