48As to whether clothing, footwear and headgear in class 25 are complementary to leather and imitations of leather, and goods made of these materials and not included in other classes' in class 18, it must be recalled that, according to the case-law, goods are complementary if there is a close connection between them, in the sense that one is indispensable or important for the use of the other in such a way that customers may think that the responsibility for the production of those goods lies with the same undertaking (SISSI ROSSI, cited in paragraph 42 above, paragraph 60).
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