Pirelli Tyres in 2011

[Chad Stewarthill]

Looks like toffee* to me.

*As said by Mr Pirelli** during FP2

**Not his real name but I didn't catch it during the show!

Do you mean Paul Hembery?

 

[F1Yorkshire]

I didnt get the name, he was Pirelli's representative and they describe marbles as toffee due to to their sticky nature