Always read and follow the care instructions and any warnings on the garment label. And, follow the General Rules for washable fabric stain removal.
The best way to deal with crayons is to get advice right from the horse's mouth....Crayola! See their removal tips at their web site.
For another option, here's what another source says: Scrape excess crayon with the dull edge of a butter knife.
Wash in hot, soft water with soap, such as Ivory and 1/2 cup baking soda for 10 minutes.
If the stain remains, work soap paste into the stain. Wash 5 minutes. Rinse.
To remove any remaining color use bleach or color remover as safe for the fabric. Always test for color fastness.
ZYIA - Item 107 - White Bomber Bra
A customer favorite, our vented Bomber bra offers a beautiful blend of form and function so perfect, you're going to want to stock up. The bomber provides medium all-day support without hardware, making it as easy to own as it is to wear. A flattering, supportive fit and charming racer back detail will make you want to show it off.
ZYIA - Item 320 - Black Twist Tank
A stylish, and highly functional top, our twist tank features a twisting strap that layers well with all your sports bras while keeping you cool. Four-way stretch fabric and flat-serged interior seaming offer maximum comfort without chafing. The versatile design features a slightly scooped hemline and medium-high neckline, making it a go-to choice for any activity.