The Max Boost Testosterone Booster Program includes Optimus Red and JetPack, which contact the testicles but are safe and painless if used correctly. Optimus Red, which involves no heat transmission or harmful light exposure, might slightly warm from body heat - this is normal. It doesn't emit infrared or ultraviolet rays. The JetPack, designed for cooling, should not cause pain either. Discomfort indicates a need to let the pack warm slightly. It should be slushy, not frozen, during use. For cold sensitivity or those over 70, start with it chilled in the fridge and consider using it over underwear to avoid direct skin contact, ensuring you feel no pain.