MacGregor rubber-covered footballs with nylon windings and butyl bladder construction. Pebble grain exterior with raised laces and stripes. All prism packs include one of each color: Blue, Green, Orange, Purple, Red and Yellow. Official Size. We have the ultimate color management system with SIX colors! Use our system and provide each group with its own unique ball color! No more arguments about whose ball is left on the field or whose turn it is to play. If it's your color, it's your ball.