Personalized Pop Art Mystery Cube T-Shirt. pop art mystery cube T-Shirt - Tie Dye Blue is golden and full of wonder. 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.