GST SPEEDSKIN FOOTBALL - OFFICIAL SIZE Patented ACL laces, exclusive Wilson patterns and the new SpeedSkin leather cover combine to offer a more affordable alternative to our famous GST series of game footballs. Combining the same Wilson GST family of patterns with SpeedSkin leather technology, precision laces, and sewn stripes, the GST SpeedSkin family is a great option for feel and control for practice, developing players, or inclement weather games.