SLS Free
Does not contain the harsh and irritating ingredient sodium lauryl sulphate, which is a foaming agent (detergent) used in many body gels and shampoos.
SLES Free
SLES is short for Sodium laureth sulfate which goes through process called ethoxylation. This process involves treating the detergent with ethylene oxide which makes the molecule more readily water-soluble and potentially less irritating to the skin. Unfortunately, the ethoxylation process can lead to the accidental formation of a toxin called 1,4-dioxane which is known to be carcinogenic.