Tribal Black Stingray & Cowhide Trifold Biker WalletBlack on black the tribal shapes are cowhide, cut and raised over a base of genuine black stingray leather. Both surfaces are black, so the design shows through texture rather than color. Up close, you can see where smooth cowhide ends and the stingrays calcified grain begins. Two . 925 sterling silver skull snaps hold the closure strap, and behind the all black exterior sits a red and gold dragon brocade lining that nothing on the outside hints at.