There are approximately 642 skeletal muscles within the typical human it only takes seven of these to twist the throttle on your crotch rocket it probably takes considerably more to hang on for dear lifehoodie design reads it takes 37 muscles to frown 17 to smile 7 to twist the throttleour hoodies are super heavy at 320g and made with 80 combed cotton and 20 polyester for exactly the right comfort and fit you want from a classic hoody