the 2019 cf zen (-10) 2 3/4” senior league bat from demarini remains a favorite year after year for one simple reason. with each year comes cutting-edge innovation and a dedication to performance players have come to love.certified for and made to meet all usssa standards, the cf zen (-10) features a brand-new paraflex+ composite material construction. this material is exposed to the perfect temperature for the perfect amount of time, giving you a barrel that is consistently responsive as you drive balls out of the park. an x-lite knob that’s ergonomically designed to fit players’ hands and a patented 3fusion system give you improved weight control and an optimized feel from top to bottom – especially in the sweet spot.