Leather Insole on Tisha Bav

Can one wear leather insoles in a non leather shoe, for tisha b’av and other days that require non leather shoes?

A – No
Q – You mentioned that one can’t wear leather insoles in non leather shoes on either tisha b’av, yom Kippur or mourning. Does that include orthopedic insoles from a doctor? because if not one can get back pains from removing those insoles “arches”.
A – In that case you can wear them

RABBI SHAY TAHAN