The Fila R4 is all new for 2011 and provides an unmatched fit and feel straight out of the box. Abrasion resistant and moisture managing materials endure the wear of aggressive play. TPU shank in the midfoot for added stability to prevent twisting and control torsion. The R4 outsole is mad of Fila's EVER-GRind durable rubber which is lighter and last 30% longer than standard carbon rubber.