100 packets of pre:play! Pre:play provides the same power as Re:play (over 2,500mg of electrolytes) with time released caffeine! We went with 200mg of Dicaffeine Malate to help you use fat as an energy source versus glucose or glycogen. We also added 6g of L-Arginine AAKG to vasodilate blood vessels to allow oxygen and nutrients to flow more readily to the working tissues! If you want sustained energy and the best hydration product on the market try Pre:play!