After reading all the bad reviews in regards to returns I was a bit skeptical of the return process. I remembered that there was a little blurb about holiday purchases of wearable items on the item page. I sent them a note and within two hours Woot responded with return verification and prepaid UPS labels. That's pretty darn sweet service. If you need to do this, go to your Woot account, click on "Stuff You Bought", login again, then scroll to the item you need to return where there will be a "I Need Help" link. Just fill out the reason for return and send them a note. Disclaimer: I do not know at this time if they will be charging a re-stocking fee (which would be ironic, because I'm returning stockings) and will update this review to reflect any changes should they come.
UPDATE - no restocking fee. Returns went off without a hitch.