reet-It Tea Tree Glycerine Soap Treet-It Tea Tree Oil Glycerine Soap contains only the purest pharmaceutical grade Australian tea tree oil. Together with a gentle glycerine soap base, this preservative free formula ensures that the skin is not stripped of its natural oils. Treet-It Soap contains no unreacted caustic soda in this formula. Features: – Pack size: 135g – Contents: Propylene Glycol, Glycerine, Sodium Stearate, Sodium Laurate, Sodium Laureth Sulphate, Sodium Lauryl Sulphate, Sorbitol, Sucrose, Aqua, Pharmaceutical Grade Tea Tree Oil.