Not sure what a soy wax tart is? We have been asked everything from “Can I eat it?” to “Do I use it to make my car smell good?” These are the wax melts that you use with any wax warmer…think Scentsy. All of these wax tarts are made with pure soy wax, no added dyes or paraffins, and NO PHTHALATES which means headaches are no longer a problem. This is the natural choice for burning clean scents all year long. *Wax warmer not included.