Personalized Methane Man T-Shirt. Methane man in evaporating text is a funny design for that gassy special someone who doesn't mind being a human air freshener. Great gag gift at birthdays, bachelor parties and holidays. 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.