Color Wow Xtra Large Bombshell Volumizer 195ml - Available at M&S

The future of big, voluminous hair! Finally, a super safe, gentle way to majorly bulk up fine, thin, limp, flat hair. Xtra Large uses totally new volumizing technology: a weightless yet bulky polymer blend (fortified with strand-strengthening bamboo) that mimics a raised outer cuticle layer but leaves hair's essential natural cuticle layer smooth, intact, and hydrated. The result? Instant voluptuous, sexy, “naked” volume, body, guts and grip without compromising hair health.