After you finish filing all your forms this year, take a gander at the Grumpy Cat Taxes I Hate Them Black and Gray Baseball Tee! Embrace your grumpy side with "Taxes. I Hate Them" printed next to Grumpy Cat on the front of this funny gray shirt with black 3/4 sleeves. Body: 50% Cotton, 50% Polyester. Sleeves: 100% Cotton.