'Project Runway' peek: Techno textiles and Vivienne Tam

"Project Runway" is keeping the designers on their toes.

After a double win in the New York-inspired episode, the show is challenging the remaining seven designers to get creative from the ground up.

For the first time on the show, they'll have to create their own fabric pattern and on top of that, do it justice with a "personal" design.

Oh, and we're so psyched that fashion forward, tech-friendly Vivienne Tam is the guest judge.

Check out a sneak peek:



The episode "Hey, That's My Fabric" will air on Thursday, March 25.

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Photo credit: Lifetime