Yerba Mate - WyndHorse Especial WyndHorse Especial Yerba Mate - premium tea from Argentina This is easy drinking mate: Especial is aged for a smooth, rich taste. Rich in antioxidants, yerba mate is a stimulating green tea with caffeine Drink any time of day: hot or cold. Refreshes and energizes! Yerba mate is the natural energy drink. Make it part of your active life.