Wolfs are pack animals and that means that there is often more than one even if you don’t see the others.
This t-shirt is a great example of that as it at first glance only shows you the wolf face in the middle of the shirt but if you look closer then you can see the at the light in the background of the wolf face are also wolves.
So now you can wear a t-shirt that shows one wolf at first but actually shows seven.