This is the only white helmet that has ever been made for Petr. There was a lot of work done to find the optimal helmet version after the head injury back in 2006. Finally after adjusting all the details the last two versions were delivered - black and white. Petr decided to go with the black version. This made the white version absolutly unique. The helmet is signed by Petr on the left side and the package also includes a certificate of origin written by Petr himself. All proceeds from the article purchased help directly to run the foundation Nadace bez pomoci (Movement Without Assistance) of Professor Prof. PaedDr. Pavel Kolář, Ph.D.