The feeling you get when you crack open and chug a can of Kill Cliff Free Fall. Kill Cliff is made from the highest quality ingredients available and may help you perform at a higher level for a prolonged period of time. It can improve endurance and speed recovery. Kill Cliff is low calorie and lightly caffeinated, with a natural lemon-lime flavor. Kill Cliff is a refreshing alternative product and it tastes great. A portion of the proceeds from every case sold is donated to Navy Seals and special operations related charities.