Nike Kobe Bryant That’s Mamba Shirt Size Large. This size is sold out online. Never worn Kobe Bryant's legacy extends beyond just the court. The "Mamba Mentality" he created is defined by a relentless drive to be your best in everything you do. Embody that attitude with the "That's Mamba" T-shirt. Its classic fit and soft midweight cotton provide the comfort you love, while graphics honor Kobe's unforgettable impact.