Mizuno MZE243 Bamboo Elite Wood Baseball Bat - Navy/Red - BBCOR Certified BBCOR Certified 120 day warranty, one-time replacement Bamboo and Glass fiber is melded together in the handle and taper of the bat while combined with the bamboo barrel for superior durability Sanded handle for improved grip Over 30 years of experience in engineering of Bamboo bats - US Patent Pending Design