102It is also irrelevant whether the characteristics of the goods or services which may be the subject of the description are commercially essential or merely ancillary. The wording of Article 3(1)(c) of the Directive does not draw any distinction by reference to the characteristics which may be designated by the signs or indications of which the mark consists. In fact, in the light of the public interest underlying the provision, any undertaking must be able freely to use such signs and indications to describe any characteristic whatsoever of its own goods, irrespective of how significant the characteristic may be commercially.