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.
DRAPER BODY THERAPY® WINTER CAP
This fuzzy and comfortable cap provides the wearer protection in cooler weather with added therapeutic benefits. It is used over the ears and crown area (head) to provide an increase in circulation along with regulation of body temperature. The Draper Body Therapy Winter Cap contains 50% Celliant® (Polyester) and 50% Polyester. Celliant® is the world's most technologically advanced fiber which contains a proprietary blend of minerals which have been extruded into a polyester fiber. Learn more about this technology. Shop for this technology>
ATTITUDE SUPPLY SACK PACK
Made with coated ripstop Nylon fabric on top and 500 denier coated Cordura® Fabric on bottom. Sack Pack features include: Big, outer pocket with waterproof YKK zip closure; Double stitched with Nylon threads; Light loop to be seen during night rides; Chest strap for action sports; and can be folded in its inner pocket for convenient carry. Handmade in Milan, Italy. Learn more about this technology. Shop for this technology.