KR3 Birch Crossover C271 ( 7) Wood Composite Baseball Bat mens gloves mitts The lightweight design sets up The lightweight design sets up and breaks down in less than two minutes Pro Bands are the perfect training tool The KR3 Birch Crossover C271 ( 7) Wood Composite Baseball Bat is made from the finest quality Hi Impact Yellow Birch of the highest bat standards harvested from second growth forests being regenerated each year The Birch Crossover is strengthened with fiberglass biaxial sleeving applied with KR3's special Rock Resin Epoxy which was designed by the President of KR3 who has over 45 years of experience in making baseball bats