Fresh up your look and be green at the same time with this certificate for a Single Process or Partial Highlights. You can have beautiful hair without submitting yourself to toxic chemicals and their fumes! Cover those grays or add some beautiful highlights (or lowlights) without Ammonia or Formaldehyde. B. Wallis Organic Hair, located at 40th/8th in Midtown Manhattan, is a clean-air salon that uses the most organic professional hair care, coloring, and styling available.