LifestyleExtreme freeridingTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoLifestyle01/21/2018January 21, 2018Austrian freeriders Matthias Mayr and Matthias Haunholder love extremes. They've skied in Siberia in temperatures of minus 55 degrees Celsius. And they film all of their adventures to share with others.https://p.dw.com/p/2r6ScAdvertisement