You can always trust Grumpy Cat to say what's on her mind. Case in point: the Grumpy Cat You Got Old Navy Blue and Gray Baseball Tee! This funny gray shirt with navy 3/4 sleeves reads "Happy Birthday. You Got Old." around a black and white picture of Grumpy Cat with colorful confetti as her backdrop. Body: 50% Cotton, 50% Polyester. Sleeves: 100% Cotton.