The Jordan IV was retroed 1999 in white/black and black/cement grey. Stores sold out after a few hours and demand was high; a complete change from the retro versions of Jordan I, Jordan II, and Jordan III. At the same time, Nike/Jordan realized an opportunity to create more sales by releasing Retro+ models with a similar design but different colors or very small design changes. These Retro+ models sold fairly although reactions to them are mixed.