When you wear this beautiful royal blue halter mermaid maxi dress, just adjust the halter strap to fit your neck comfortably. For the best look, make sure the mermaid skirt falls smoothly. This dress is made of polyester, so it's relatively easy to take care of. You can machine - wash it in cold water on a gentle cycle. Avoid using bleach as it may damage the color and sparkle of the dress. Hang it to dry to keep its shape. If there are any wrinkles, you can use a low - heat iron to press it gently. And remember, if you choose custom sizing, double - check your measurements before sending them to us to ensure a perfect fit.