Kerastase Symbiose Pyrithione Zinc Antidandruff Hydrating Shampoo for Dy Sensitive Scalp Size: 8.5 fl.oz/ 250ml Brand new and sealed. Expiration date: Jan 2025 What it is: A moisturizing sulfate-free shampoo formulated with Pyrithione Zinc that gently cleanses, purifies the scalp, and hydrates hair and scalp prone to dandruff.