IN POLAND, THIS SUMMER YOU CAN JOIN WHAT IS MAYBE THE WORLD´S LONGEST ROLLERSKI RACE; THE ARENATAX ULTRAMARATHON OF 200 KM. THE RACE IS OPEN FOR ALL (YOU CAN ALSO REGISTER FOR SHORTER DISTANCES) AND ALL THE REGISTRATION FEES WILL GO TO SUPPORTING YOUNG NATALIA THAT FIGHTS MALIGNANT BONE CANCER.