Personalized Retro Skull T-Shirt. Retro skull is a blast from the past, rocking out green flames and screaming red eyes! Rockabilly, tattoo flash fun! 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.