Personalized 30th Birthday Cleverly Disguised T-Shirt. It's your 30th birthday! Now you're cleverly disguised as a responsible adult. Perfect funny and humorous fun gift tee! Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.