In a word, research. Our very first product, the SmarterLife Products SmartSport Premium Exercise Ball, was the result of hours of research into this deceptively simple piece of exercise equipment. As fitness enthusiasts, we wanted a ball that was eco-friendly, safe and strong. We discovered that the vast majority of balls didn`t meet all three requirements, so we made one. Our fitness ball has no latex, uses anti-burst technology and is one of the strongest you can buy.