Almost impossible. They sent an incorrect size to me in error. I tried calling for days, only to receive a message saying the call volume was large and to call again. The phone hung up without additional options. I then tried emailing through the 'contact us' on the website. I received an automated reply 2 days later with a 'sorry for the inconvenience, would you like to exchange or return'. No reply after I answered and no answer on the phone. I still have the incorrect size they mailed out and no response to my request to be called by someone in management. I'm REALLY disappointed with this company and would never buy from them again.