To use this swimsuit, simply put it on like you would any regular one - piece. It's designed to fit true to size, so pick your usual size. When wearing it, you'll notice how the waist - cinching belt can be adjusted to your comfort. As for maintenance, it's best to hand - wash the polyester swimsuit in cold water with mild detergent. Avoid using bleach as it can damage the fabric. After washing, gently squeeze out the water and lay it flat to dry. Don't wring it out, as this can distort the shape. Also, when not in use, store it in a cool, dry place away from direct sunlight to prevent color fading.