Brothers Sergey and Andrey Nefedrov, both from St. Petersburg, are well-known among the mountain-climbing crowd. Holders of the 2009 Russian Mountain-Climbing title, they have managed to make their hobby into a successful career and have accomplished quite a lot. They were the first people to transerf (climb without the use of any artificial footholds) Kyrgyzstan's 5,217-metre Mt. Aksu. They also hold the world rope jumping record with the longest free fall. Their authority in the mountain-climbing world has helped them to widen their scope into business: Sergey opened his own climbing school while Andrey travels around the world taking part in a variety of different extreme sporting events an.d projects.