Text: These companies made their mark selling sturdy commodities like chamois cloth shirts and field boots that are easy to keep in stock because the demand for them is stable from year to year.
Entailment: Consistent items, like chamois cloth shirts and field boots, helped the companies to make their mark.
Contradiction: Instead of choosing reliable, consistent commodities, these companies tried (and failed) to be successful by focusing on exotic clothing that is hard to keep in stock.