Harry Ohlig, BLACKROLL® fan, states clearly: without BLACKROLL® - nothing goes. We gave him a vibrating BLACKROLL® VYPER to test and are quite curious what his opinion is. „After running over 500 half marathons in a row since February 2014, I can say with absolute certainty: without the daily recovery sessions with BLACKROLL®, I could not have done it. With these tools, I can keep on going - on to my 1000th half marathon. Thank you, BLACKROLL®!"