Bogs Kid's Mattie Jr Bubbles Ankle Boot (Toddler/Little Kid) Rubber and fabric Made in USA or Imported Rubber sole 100% Waterproof Natural hand-lasted rubber and a four way stretch inner bootie Non-slip and non-marking outsole Removable polyurethane sockliner with an Aegis anti-microbial odor protection insole Comfort rated from temperate to sub-zero conditions