There's no party like a clothing swap party, and ladies everywhere can attest. Whether you've hosted your own  or convinced your BFFs to trade, it's a fun and free way to refresh your closet. These days, a new app from the website 99dresses  promises to make the whole concept even easier. Calling itself the largest 24/7 clothes swap party to hit the planet, it's changing the trading game straight from your phone.
The way the free app  works is pretty simple. List your unwanted goods by uploading a picture and including details like the brand and original price. You then earn "buttons" based on the value of the piece, and you're free to spend those points on clothes or accessories listed by other users. All you pay for is shipping and a small swap fee.
If, say, multiple women want the same piece before the 24-hour listing period is up, whoever has the highest "karma" scores the item. How do you get good karma, you ask? By listing high quality items and racking up positive feedback on transactions. Good juju for the win.
Consider this one party where you don't want to be late, but you'll still definitely be fashionable.