I always come back...
My hair is blonde, straight, and of a medium thickness, and I have highlights applied to the sides and crown every two months. I used this shampoo and conditioner for years, having been introduced to it by my stylist. About six months ago, I decided to try a more environmentally-friendly shampoo and conditioner, which worked fine for several months. Then one day, I noticed my hair was becoming dry and brittle. I wondered if it could be the shampoo, so I went back to Matrix Sleek Look. The moisture returned to my hair immediately. I love this shampoo and conditioner. It always works for me. (I subtracted one star for lack of environmental friendliness.)