Christmas git ideas for yoga loving wife

Hello all,

I guess the title is more or less self explanatory. My wife is difficult to shop for, but she enjoys yoga so I'm looking for gifts related to yoga. She already has a couple of yoga mats, but they're inexpensive ones. Is there something like the Ferrari of yoga mats? Or is there another yoga related gift that would be appropriate?

Thanks in advance for any suggestions.

ETA: OMG, is this like the busiest subreddit ever?

ETA (#2): This morning my wife just asked me for a new yoga mat for Christmas. LOL, I guess the surprise is ruined. I showed her this thread, and we are shopping online. Thanks everyone for your comments.