Adidas Outdoor has signed a sponsorship agreement with Hayley Ashburn, a 25-year world slacklining champion. She set the record for the highest highline by a woman in Yosemite Valley, where slacklining started back in the 1970s. Last month, she was part of the first team to have successfully walked a hot air balloon highline in Las Vegas. Adidas Outdoor has also signed up Don Bowie, a Canadian-born high-altitude alpinist who has been involved in difficult climbing challenges for the past 18 years.