Like the similar designed skeleton print shirt, the training pants share the same illustration of the human anatomy but for the lower torso. I should note the pelvic bone does not really line up with my actual pelvic bone unless I pull the pants up well above my belly button. Since I wear my pants a little lower the design is technically off with the knee bone image not lining up with where my actual knees are. I'm also on the shorter side (5'5) so the pants run longer on me and so they bunch up around my ankles but it's not bad. These pants are thick and very comfortable for fall and winter weather or just lounging around the house. The only thing that's uncomfortable is the thick rope that acts as a waste band. If you decide to lay on your back, you will need to adjust the pants because the thickness of the rope may it dig into your lower back. Despite these things however, I tend to wear these on trips or just hanging around and they feel very nice. I would have preferred if they were a little cheaper than USD $58 but hopefully these will last a long time to justify the price.