Penetraitt Overnight Repairing Serum by Sebastian is a leave-in hair treatment designed to work while you sleep, helping to restore and nourish hair overnight. Its lightweight serum texture absorbs quickly without leaving a heavy residue, making it suitable for regular use.

This unisex hair serum is intended to support the look of smoother, healthier-feeling hair by morning. It fits easily into an existing routine as an overnight step after washing and before styling the next day.

The product comes in a 3.2 oz size and is offered as a serum. It is positioned for those seeking a dedicated overnight repairing treatment for their hair.