CERMT (Carolina Emergency Response Massage Team) Essential Oil Blend contains the finest variety of Lavender, Peppermint, Cajeput, Niaouli, Tea Tree, Rosemary, Eucalyptus, and Fir. This blend was originally developed to go into a massage oil, however, we have left out the carriers so it's safe for diffuser use as well. It's very important to note that this is a concentrated, base blend. If using for massage, CERMT blend must be diluted before skin contact. We suggest that this blend be used by professionals who understand skin types and the relevant precautions associated with essential oils. Please note that this blend is concentrated; made up of essential oils only, no carriers.