The Outline Brush allows you to create dual lined strokes - making it easy to create coloring book style letters!

See my blog post here for an example of it in use: http://printablewisdomblog.com/how-to-create-a-handlettered-coloring-page-on-the-ipad-pro

Completely customizable within the app!
For use with Procreate app on iPad Pro. Once purchased, you will receive an email with your .zip file containing the brush file. To unzip on iPad, I recommend using the iZip app. Download the file from your email, and select "open in iZip." Once in iZip, extract all files and when your .brush file is downloaded select "Open in Procreate." Open the Procreate app and scroll to your "imported" brush folder to find your new brush!