Use at room temperature or microwave briefly for approximately 10 seconds to provide warm soothing relief and diffuse organic lavender essential oil aromatherapy. Wash slipcover in cold water and tumble dry. Spot clean insert as needed, insert must remain dry. We do not add synthetic fragrance or essential oil to the filling. If you would like a stronger lavender aroma, we recommend adding essential oil to your slipcover to suit your specific aromatic preference.