Unfortunately, based on their policy, you will most likely not qualify for a return. They will find something that will disqualify you from even their partial 80% refund (and if you received free shipping initially, that amount will be deducted from your refund also).
If you DO get through to them within your 14-day window, they will first suggest that you to try to sell the dress on Craigslist. If you were out of you 14 day return window, they will tell you 'tough luck.' If the dress actually makes it back to them within the return window, they will say that the dress smells like perfume, or they'll mention other signs of wear (even if you never actually tried it on). But it seems that most often the dress won't make it to the given address in the first place, and it will end up "abandoned" and you won't receive anything at all.

If you are returning the dress because it was not as described, I highly recommend opening a PayPal case if you want to even think about getting any of your money back. But even then, it's still not guaranteed that you will. I haven't yet heard of anyone making a successful return to this company.
I have a pending PayPal case currently, just paid $65 out of my pocket for return shipping, and am crossing every finger on my body tightly that the dress will show "delivered" on the USPS tracking.