In 2006, the Air Jordan 21 made its debut as a low-top sneaker, incorporating a stylish blend of black and red colors. Crafted with a suede upper in black, this design showcases striking red accents. What sets this sneaker apart is its innovative construction, including a Phylon midsole equipped with Independent Podular Suspension units for enhanced support. Notably, the Air Jordan 21 boasts an interchangeable heel feature, allowing wearers to select between Zoom Air pillars or encapsulated air pillars for personalized comfort and cushioning.