SOBOOST is available in 4 shades:
- Yellow: brightens brunettes and softens reds.
- Blue: neutralises unwanted brassiness when lifting and adds cool tones when darkening.
- Red: intensifies red, red-violet and violet formulas
- Copper: boosts vibrancy on auburns, warm browns and golden blondes
Sign up to the Professional Matrix site for even more information about mixing ratios, development times, and other technical details you may need to know!