While 'Zum' is a made-up word, Indigo Wild Zum Clean Laundry Soap Frankincense and Myrrh uses ingredients that are not. Natural, low-sudsing, highly concentrated and great for high-efficiency machines, this laundry soap contains coconut oil soap to clean and lift stains, baking soda to remove odors and pure essential oils to create the perfectly scented ending. No parabens, phosphates, petrochemicals or sulfates. Washes 16 loads in top-loading machines and 32 loads in high-efficiency machines.