The Demi is a demi-permanent hair colour by Paul Mitchell. Exceptional Shine: The Demi conditions hair while it colours, providing incredibly rich results with exceptional shine. Gentle Conditioning Formula: Deposit-only, no-ammonia colour is exceedingly gentle and offers outstanding condition. Perfect Gel Consistency: Liquid colour mixes to a perfect gel consistency thats ideal for both bottle and brush application. Long-Lasting: Rich, vibrant colour lasts 4 to 6 weeks. Intermixable Shades: Including Clear for unlimited customisation and more varied shade options with depth and/or translucency.