Why dry Clay mask ? 
There is SOOO many good options to mix clay masks with that can’t be premixed due to spoiling such as yogurt, milk, eggs, avocado, honey just to name a few. 
This way you can mix with what you desire what you need and storage the dry Clay mix for next use safely without spoiling

Colloidal Oats:
All skin Types 
It has been shown scientifically to improve all kinds of common skin concerns, including eczema, psoriasis, sunburn, bug bites, hives and rashes. Plus, it's safe for children and pets too

This pouch makes 8-10 masks

Dry Clay Mask - Colloidal Oats