I guess that's the side you'd put to the wall, haha. I love it. It's flexible, easy to wear and not too hot. I do recommend pinning the shoe covers to your pant legs as they tend to get under your feet when you walk. I also recommend wearing brown pants to replicate a trunk. It looks awesome! This has been on my top ten things to be for Halloween list for a long time.  ** If anyone bell rings for the Sal Army, if you wear it, it seems to increase donations. **