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.
MEN'S HORIZONTAL DR. COOL SHIRT
This shirt is constructed using Coolcore's patented chemical-free moisture and sweat activated material to make sweat work for you. Rather than a simple wicking technology, the material delivers three distinct functions: wicking, moisture circulation, and regulated evaporation to reduce the fabric's surface temperature by up to 30%. Unlike other workout shirts Dr. Cool is chemical-free so that cooling benefits last the life of the shirt. Learn more about this technology. Shop for this technology>
Dr. Cool’s Reversible Chill Wristbands, sold as a pair, will keep your pulse points cool, dry and comfortable. They are made using Coolcore's patented cooling fabrics, which are sweat activated to provide three distinct functions: wicking, moisture circulation and regulated evaporation. Unlike other cooling accessories, Dr. Cool's wristbands are chemical free, so the cooling benefit will never wash out. Colors: Black, Fuscia, Monaco Blue, Red, Striped Fuscia, and Watercolor. Learn more about this technology. Shop for this technology.