Over 200,000 IV catheters are placed daily in the United States; however, there is a 50% fail rate for correctly placing the catheter on the first needlestick. Healthcare students need to be able to train to place IVs, but existing arm trainers lack anatomical and physiological accuracy. As a consequence, students resort to practicing on other students or on patients, which poses an infection risk. This new arm trainer has a unique four-layer tissue and rolling vein behavior that provide the most realistic training experience possible for students.