The menthol in RockSauce Ice, called an analgesic, creates a powerful cooling sensation that stops discomfort* fast. You’ll feel it working instantly and it lasts for hours. RockSauce Ice includes 6% Menthol, the active ingredient that provides discomfort* relief. The most popular cooling roll-on only includes 4% – a difference of over 30%. Trust us, it’s a difference you – and your muscles and joints – will feel.