The Air Jordan 21 (XX1 or XXI) Retro - Countdown Package 2 / 21 (Black / Metallic Silver - Varsity Red) were released on April 26, 2008 and retailed for $310 along with the Air Jordan 2 (II) Retro - Countdown Package 2 / 21 (White / Varsity Red). They feature an all black suede construction along with red accents, including red piping along the side panels. Like the original Air Jordan 18 (XVIII) models, they consist of specifications such as an extended heel counter construction, carbon fiber shank plate, and Jordan Brand’s patented I.P.S. technology for better traction.