Nike claims the ninja style headbands "unprofessional" for NBA basketball, yet Rafael Nadal is rocking one in the US Open Men's final... with a Nike logo on it. : r/nba
Headbands. Nike.com
Hats, Visors, & Headbands Basketball. Nike.com
Headbands. Nike.com
Mike Scott suggests Nike will not allow players to wear ninja-style headbands