Each Earth Science 4-pack contains four different covers:

Impress your friends at the dig site with your awesome new Dinosaur Bones spiral notebook

inscribed with a mosfet diagram in silver foil

or you can flip it around and wear it with the marine life design on the outside for all the world to see

your friend the entomologist

Skull Anatomy Sweatshirt - Organic Size:XL Each Earth Science 4-pack containsWhether youre memorizing the names of the 17 sutures, 21 foramina, 14 facial, and 8 cranial bones in the human skull or getting ready for your first day at a new job in the medical examiner's office, this Skull Anatomy sweatshirt has your back.