If anyone has watched the rugby world cup they should have noticed that the shirts worn by the players are all skin tight, the idea is to make it more difficult to hold on to a player being tackled (shirt pulling is legal in rugby). Admitedly due to the cloth not yet being perfectly developed many more shirts are being ripped off the players backs but this would be an excellent innovation for football teams to make, the first club to do so would be at an advantage over the others until they also change kit. This could add seasons to the careers of players who go forward with the ball at their feet.