If you want to play football you will need a mouthpiece, so your teeth don't fall out. You need shoulder pads so you do not brace your shoulder. To know which ones fit they have to be not to tight or not to big. You need a helmet so you do not get a concussion. You need pants with kneepads and thigh pads so you do not hurt your thigh or knee. You need cleats so you can go faster and juke they have to stick in the ground.