Game of Thrones is one of the most expensive TV shows ever produced, but even the crew of the hit HBO series isn’t above using an humble IKEA hack behind the scenes. According to Mashable, the fur capes won by Jon Snow and other members of the Night’s Watch on the show are actually sheepskin rugs sold by the home goods chain.

The story behind the iconic garment was first revealed by head costume designer Michele Clapton at a presentation at Los Angeles’s Getty Museum in 2016. “[It’s] a bit of a trick,” she said at Designing the Middle Ages: The Costumes of GoT. “We take anything we can.”

Not one to dissuade customers from modifying its products, IKEA recently released a cape-making guide in the style of its visual furniture assembly instructions. To start you’ll need one of their Skold rugs, which can be bought online for $79. Using a pair of scissors cut a slit in the material and make a hole where your head will go. Slip it on and you’ll look ready for your Game of Thrones debut.

The costume team makes a few more changes to the rugs used on screen, like shaving them, adding leather straps, and waxing and “frosting” the fur to give it a weather-worn effect. Modern elements are used to make a variety of the medieval props used in Game of Thrones. The swords, for example, are made from aircraft aluminum, not steel. For more production design insights, check out these behind-the-scenes secrets of Game of Thrones weapons artists.

[h/t Mashable]