Brightens up colours smoothes fibres and softens laundry eliminates detergent residue and neutralises ph value of fabrics thanks to the natural citric acid no fragrance no essential oils 100 biodegradable suitable for all types of fabrics and washing programmes add to the final rinsing water sonett laundry rinse helps to rinse out detergent residue and neutralises the rinsing water important for allergy prone people