See my blog about sulfites/sulfates/SLS before you purchase any more chemical-laden products for your body and hair.
SLS's are strong degreasing detergents which are bioaccumulative and harmful to your skin, scalp, and body. They are in most every shampoo and in face/body washes. Skinplicity does not carry or use products with these substances in them.
I personally use this line of shampoo & conditioners and they work very well. Another nice thing is that the price-point is great - No more than you would pay at your salon, Ulta, or Sephora. Available only from licensed professionals.
If you are seeking a stylist/colorist that uses safe, organic hair color and products, let me know... I know a great one.