Best Protection-The high-impact foam interior provides core protection for lower back, kidneys and spine. Against impacts coming from the back. Fendouer football made by 100% PA + 100% Polymer sponge+100%PVC, designed to absorb impact and fits comfortably around your waist. It doesn't limit your movement, speed or mobility. Slightly curved cushion for a snug fit on the back. Makes you enjoy the football games and also protect yourself in a more safe way.