Xt S Jr. Trainers:Complementing Our Vintage Running Family,The Xt S Features A Progressive One-piece Upper As Well As Trinomic Technology That Is Visible From The Bottom. As A Direct Takedown Of The Adult Version,This Kid's Xt S Is Bound To Be A Hit. Textile Upper. Removable Child-fit Sockliner. Non-marking Rubber Outsole. Enhanced Shock And Energy Absorption.