... :material:rubber,iron,PP 3:fit most types of shoes 4:easy to fit,remove 5:factory,OEM ... reduces risk of injuries2:feature: 1):quick and easy to fit&move 2):fits most types of shoes-boots, ... trainers.casual&dress shoes 3):lightweight &durable3:fitting instructions 1 ... spikes so they are located under the ball of your foot 3):tighten the strap around your ...