Personalized 40 Cleverly Disguised Youth T-Shirt. It's your 40th birthday, and you're cleverly disguised as a responsible adult. Funny b-day humor! Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.