Brrr... things just got COLD AF™. C4 Ultimate Frost pushes supercharged energy to the icy extreme. With a blend of 300mg caffeine, TeaCrine®, and Dynamine™ in every can, it's a Tri-Stim Experience that has absolutely no chill. C4 Ultimate Frost packs crisp, fruity, and refreshing flavor with ZERO grams of sugar, artificial colors, or dyes. And thanks to the color changing can, you'll know exactly when C4 Ultimate Frost is COLD AF ™ and ready for action. FROSTY FLAVORS: Available in delicious, fruity, frosty, flavors to tingle your tastebuds. TRI-STIM EXPERIENCE: A triple threat of caffeine, TeaCrine®, and Dynamine™ make C4 Ultimate Energy hit like it’s the first time, every time. ULTIMATE REFRESHMENT: Cold Activated Can technology lets you know when the liquid is COLD AF™ for peak frostiness. ZERO SUGAR: Artificial Dyes, or colors. KEY INGREDIENTS 300mg Caffeine - For supercharged, long lasting energy​ TEACRINE® – Clinically studied ingredient designed to amplify the effects of caffeine. DYNAMINE™ – Clinically studied with caffeine and TeaCrine® for longer lasting energy. KEY NUTRIENTS – Potassium, Niacin, and Vitamin B12