I’ve been using this product for over a week now in a hot country. It has definitely helped prevent colour fade and warm tones in my coloured hair. My colour has still faded slightly and there is some warmth coming through but certainly a reduction from when I haven’t used it on previously holidays.
The pump is rubbish and not much product comes out so seems to take forever.. I also hate the smell and it leaves a bit of a funny texture on my hair. But if it works I can cope with these minor annoyances.