Most micellar waters are oil-free, but some brands create micellar water with oil. Some will be upfront on the label about containing oil, while others will require a bit more research. Generally, if a brand claims their micellar water takes off heavy makeup, it probably has oil in the formula, due to the fact that simpler micellar water won’t be able to cleanse heavy makeup on its own. Since ingredients differ from product to product, if you are looking for an oil-free micellar water, it is important to look at the label of a product to make sure it meets your requirements.