Translation of "Soles" in Spanish

I need new soles on these shoes.

Necesito suelas nuevas en estos zapatos.

Soles of the feet are insensitive to heat and cold.

La planta de los pies es insensible al calor y al frío.

- He is American to the soles of his feet.
- He's American through and through.

Él es estadounidense de la cabeza a los pies.