That is the big Z-flap. He had the same/similar thing on his Eastons.
They have elastic on them and really hug your wrist when you rotate and flex it
Haha. "Big Z-Flap." Great name. He does have some pretty unique gloves though. His Eastons always had that big flap, a mouthguard holder and a little plastic piece on the palm in the thumb area of his bottom hand.
Not sure on the looks of the new Warrior lid. Guess we'll have to see how it fits.