The Air Jordan 21 ( XXI) with Varsity Red/Metallic Silver/Black colorway were released on February 18, 2006. The Air Jordan 21 feature an all red suede upper with black and metallic silver accents. Forefoot breathe-ability features are combined with a newly engineered durable textile for support and durability in key performance areas. An evolution of the I.P.S (Independent Podular Suspension) can be seen on these from the Jordan 21 shoes , and now include interchangeable cushioning technology with a customizable heel zoom pillar or heel encapsulated pillar. This new innovative outsole of Jordan 21 shoes pattern offers multi-directional traction.