Funny Moustache Gifts. Keep Calm and Grow On T Shirt for Moustache Wax. If you are into facial hair and mens grooming this shirt is for you. Men will love this t shirt especially moustache and beard wearing guys. Hilarious tshirt sense of humor. Great gift idea for a birthday, pool party, summer BBQ or even Christmas! For mustache lovers and facial hair fans, hipsters, rednecks. I love moustaches!