A method is disclosed for the use of a modified latex making it possible to provide a combination of hydrogene bonds and covalent bonds in fibrous products. A softener product is added to the binder solution before its application onto the fibrous product. The softener is a natural latex added to a latex binder contained in a water suspension. It has surprisingly shown that a product manufactured with a modified latex will occur more soft and silky and also stronger than products made by use of a normal latex binder. The modified latex is especially suitable for use in a process in which a mechanical softening treatment is effected on the fibrous product.
