"Calza" is an Italian word, which means "stocking" or "pantyhose". In the context of a porn video tag, it typically refers to content that features women wearing stockings or pantyhose as part of their outfit. This could include scenes where the woman is dressed up in lingerie with stockings, or simply showing off her legs while wearing them. The focus of this tag would be on the eroticism associated with tight-fitting or revealing hosiery