Sebastian Professional Craft Clay is a matte styling clay built on kaolin and bentonite (quaternium-90 bentonite) clays suspended in a petrolatum-and-beeswax base, giving it firm-but-flexible hold with no shine. It's formulated for short-to-mid-length hair and is meant for reshaping through the day rather than setting a style once and leaving it.
The clay warms and emulsifies quickly between the palms, then works through dry hair to add texture, rough up roots for lift, or define and separate ends. The finish is completely matte and slightly gritty rather than glossy, which is the main reason to pick a clay over a cream or gel-based product.
It's a professional-strength formula that's also sold at retail, and suits anyone who wants strong hold with a natural-looking, non-shiny texture on shorter styles.