Ever wonder how Game of Thrones looks so authentic? Well, it’s got something in common with your first college apartment. That’s because Game of Thrones often uses IKEA rugs as capes, the New York Post reports. Thrones costume designer Michele Clapton, a multiple Emmy winner for her work on the show, revealed her secret in a Sunday speech in Los Angeles.

“These capes are actually IKEA rugs,” Clapton said.

Although Thrones costs roughly $10 million per episode, everybody appears to be shoe-stringing it these days.

“The budget is the same every year regardless of what we’re filming—it’s okay, but it’s never enough…Sometimes if you’re restricted, it makes you more clever about what you’re doing. You can look at things, you can reuse things.” Clapton said.

After the rugs are acquired, they’re altered significantly to make them appear to be something wearable in Westeros. The rugs are dyed, shaved, and weathered, to simulate the appearance of use. In other words, the rugs are used by college students in dorms for a few weeks and then returned to set.

If IKEA doesn’t find a way for a killer marketing campaign around this, then they are seriously missing out on a great opportunity.