Personalized Entomology Bug T-Shirt. Entomology don't bug me with an image of a bug wearing glasses is a funny gift design for birthdays, holidays, back to school and graduation. 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.