The official match ball of the 1986 FIFA World Cup was called Adidas Azteca and was the first World Cup ball to be named and decorated completely in honour of the host nation. Ever since, Adidas has kept this practice for all of the following World Cup balls. This ball was not made of real leather but instead, it was the very first official World Cup match ball to be made of synthetic materials. This new construction made it possible for the ball to recover its original shape immediately after being kicked and could retain it for a long time, even at high altitudes, on rough surfaces or during wet conditions.
Content courtesy of Worldcupballs.info