Nikwax tx direct has been designed specifically for breathable waterproof garments and works to replace and restore their water repellent finish if your garment loses this finish it will soak up water which in turn will restrict the breathable performance of membranes like gore tex or event by applying tx direct wash in in your washing machine you will ensure that the treatment passes through the entire garment treating seams tapes cords and the fabric the dwr develops after the wash