I pretty much did what is shown in this video except I used 6 sort of thick rubber bands.
https://www.youtube.com/watch?v=t3ffd0TiNmY
The video makes it look easier than it is (or maybe I'm just bad). What I usually do is I rotate the big part of the tag while wrapping the rubber bands around. You'll hear a clicking noise when it starts to come apart. I recommend trying it with something thick first like jeans or a sweatshirt. I stretched out a couple shirts before I got the hang of it.
Stop_and_Shoplift wrote
Reply to Methods of lifting unique ones best ones ? by Lifterscooge
Read this thread linked by Deadman a while back. I found it had a lot of useful information and methods of lifting for anyone new. https://raddle.me/f/Shoplifting/53705/link-a-pretty-long-thread-worth-reading-for-those-new-to