Key Benefits: Great for enhancing hair treatments and masks. [Turn cap inside out and place plastic side in over treatment coated hair. This retains heat to deepen penetration of hair treatment] Protects hair from humidity and moisture in the shower Waterproof exterior One size fits all How to use: Keep hair dry by tucking hair into cap, terrycloth side in and pull elastic securely over head Hand wash or machine wash on gentle cycle; as required Pro Tip: Hang inside out to dry after each use