Filament is a professional-grade haircare brand founded by Nathan Puksta, a beauty industry veteran who previously led brands at L’Oréal, such as Kiehl’s and Baxter of California. The brand develops science-backed hair strengthening products built on TENSILYX, a proprietary ingredient designed to restore structural damage and increase hair tensile strength. Filament’s products are available in both professional formulations for salon-use, as well as at-home use.