Most modern association football balls are stitched from 32 panels of waterproofed leather or plastic: 12 regular pentagons and 20 regular hexagons. The 32-panel configuration is the spherical polyhedron corresponding to the truncated icosahedron; it is spherical because the faces bulge from the pressure of the air inside. The first 32-panel ball was marketed by Select in the 1950s in Denmark. This configuration became common throughout Continental Europe in the 1960s, and was publicized worldwide by the Adidas Telstar, the official ball of the 1970 World Cup.
The familiar 32-panel association football ball design is sometimes referenced to describe the truncated icosahedron Archimedean solid, carbon buckyballs or the root structure of geodesic domes.
Balls are usually stitched from non-waterproof plastic, similar to the design of the modern volleyballs and Gaelic footballs, and laced to allow access to the internal air bladder.
The official FIFA World Cup association football ball for Germany 2006 matches was the 14-panel Adidas +Teamgeist. It was made in Thailand by Adidas, who have provided the official match balls for the tournament since 1970, and is a "thermally bonded" machine-pressed ball, rather than a traditionally stitched one. Adidas will continue to supply the official association football ball for the 2010 and 2014 World Cups.[11] In 2010, the official match ball Jabulani's design received criticism, with former Arsenal goalkeeper Bob Wilson describing it as a "beach ball" responsible for a rise in errors by goalkeepers and Spanish goalkeeper Iker Casillas also called it too rough for the goalies .[12]
Another ball with an innovative pattern is the 26-panel Mitre PRO 100T.
There are also indoor footballs, which are made of one or two pieces of plastic. Often these have designs printed on them to resemble a stitched leather ball.
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