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.
CAMELBAK® SKIRMISH PACK
This pack, made with 500D CORDURA® Classic fabric, is durable with some serious features. Its sleek composite MOLLE paneling provides secure attachment for pouches and gear. Skirmish features the Mil Spec Antidote® Lumbar Reservoir. The exclusive reservoir design moves the weight of the water onto the hips to ensure a comfortable/ergonomic load-carry as well as lower center of gravity. The full clamshell opening allows for easy access to the main compartment. Learn more about this technology. Shop for this technology>
ATLAS 46 TOOL HOLDER SYSTEM
The Atlas Integrated Modular System (AIMS ) was designed to integrate with any belt up to 2" and/or any AIMS platform. Simply secure your AIMS pouches or add-ons to any belt or platform with our patent pending Lace and Latch technology. This system gives you the freedom to arrange your gear the way you want it, there's no easier way to scale up or down and take exactly what you need for that next big job or small project Learn more about this technology. Shop for this technology.