Nike Core DF Open Hem Baseball Pants - Boys' Grade School Up your game in the Nike Core Dri-FITŪ Baseball Pant. This knit pant has reinforced knees for durability and two back pockets. Moisture-wicking, Dri-FITŪ materials will help keep you comfortable throughout the game. Brass zipper and two metal snaps. Standard, open-hem fit. 100% polyester. Imported.