Gaiam Skirt with built in underwear

My sister left this at my house and so I'm going to get rich! Help make that dream possible by buying this awesome skirt-thing! It's that stretchy recycled polyester that is great for hiking in. The color will pop next to any mountain or river that you want in the background! There's some weird spot I just noticed on the back (see picture). I'm going to give this a wash and see if it comes out. Make an offer!