All lunilou products have undergone an ozone process. That means all of our products are healthful for the skin and contain no chemical residues. Ozone is a green laundry chemical made of oxygen which eliminates harsh chemicals, bacteria, viruses and odors that can’t be completely eliminated by traditional laundering methods, and without using large amounts of energy, water or harmful chemicals. Ozone laundering system makes our products eco-friendly, neutral and beneficial to gentle children’s skin. Because of this process, colorful products pick up slightly faded, vintage look.