Need help controlling flyaway hair? Tresemme Keratin Smooth With Marula Oil Deep Smoothing Hair Mask 300ml Formulated to smooth hair frizz and tame fly-always, this mask delivers up to 72 hours of frizz control. Keratin-enhanced formula. Keratin proteins are the natural building blocks of your hair and work by smoothing down the hair cells, leaving strands stronger, smoother and easier to manage. • Enriched with marula oil, this fast-absorbing and ultra-lightweight oil seals the hair follicles for ultimate softness and shine. • Five benefits in one. Our professional formula is designed to fight frizz, detangle knots, boost shine, add softness and tame fly-always.