Z-Bo on Twitter: "According to @mikescott, @Nike and @NBA have banned the ninja-style tied headbands that became so popular last year. According to Scott, Nike said they appeared “unprofessional”. 🏀 Bad move
NBA Won't Allow 'Ninja-Style Headwear' to Be Worn by Players During Games | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Milan Pink Ninja Headband – SLEEFS
NBA bans ninja-style headbands due to safety concerns - Sports Illustrated
Headbands & Head Ties | Champs Sports
Nike Head Tie Embroidered Swoosh Dri-fit 2.0 Tennis Headband Bandana Royal Blue
Sports Headband Tie Ninja Bandana Hair Back Band Karate Head Tie for Men Women | eBay