Description Related Variations Glass 1 smoothing complex revives dry hair with high shine, vitality and resilience. Oil-free formula repels moisture, protects against frizzies. Product Options Available are as follows:Size : 2.0 oz. - Redken Glass 01 Smoothing SerumSize : 4.0 oz. - Redken Glass 01 Smoothing Serum Redken Glass 01 Smoothing Serum