The challenge was

Create a super cat design.

Laser cats. Ninja cats. Cats with beards. Unicycle-riding cats. These are just a few of the many skilled and talented cats that call Threadless t-shirts across the world home.

But there’s always room for one more super cat in your t-shirt family. Especially when that tee can help prevent cruelty to animals. In honor of Adopt a Shelter Cat month, we’re challenging you to design super cat tee.

You can submit a design featuring a cat with amazing superhero powers. Or, you can create a cat supervillain t-shirt that’ll make dogs quiver in their paws.

But no ordinary cats, please. Because we need a super cat tee to do super work for animals throughout the United States. Threadless is proud to support ASPCA and its mission to save lives.