Curly Girl Method terminology:
Once the curl gel has been applied to the hair and allowed to dry it will be crunchy and the hair will feel like crispy noodles.
The gel has set around the hair shaft like a cast on a broken arm. This is known as a cast because it feels strong and hard to the touch but can be easily removed.
The cast is an important part to the method as it freezes in all the hydration and moisture from the previous steps in wash day and styling. A good cast will help the Curly Girl get more days out of their wash day.