Analyze the relationship between 'Skechers' and 'shoe' within the context of the input sentence.
Options: location of formation, product/material produced, owner of, legal form

July 29 (Reuters) - Sports shoe maker and retailer Skechers USA Inc reported a better-than-expected 36 percent rise in quarterly revenue, helped by pent-up demand following the end of labor disruptions at U.S. West Coast ports that had held up imports, as well as increased shipments of back-to-school items.
product/material produced