Dont know much about chemistry this official breaking bad designs shows the chemical elements helium and phosphorus which are also the initials of heisenberg and pinkman meth chefs extraordinaire ltbr gtltbr gtt shirt design reads heisenberg pinkmanltbr gtltbr gtour crew neck short sleeved mens t shirts are 100 premium cotton in a soft pre shrunk jersey knit our womens t shirts are lighter weight 150g tees made with deluxe 30s soft style yarns for a soft feel