Size 3, 4 and 5 Panel Configuration 32 Panel Conventional Design Series Machine Stitched Casing material TPU. Non yellowing. Non-solvent, environmentally friendly TPU material. Excellent abrasion resistance. Smooth and textured surface. Lining High dense foam ensures soft feeling and consistency of rebound and power, reinforced with high density polyester canvas. Bladder Rubber bladder for brilliant air retention and response. Description The Striker soccer ball is a training quality ball.