kids orthotic insoles kids flat feet inserts for moderate arch support, comfort and soft cushion (17.9 cm / toddler 8.5-11) comforfeet our pu insoles are designed to help kids with 3/8 inch arch support and increased shoe comfort. if your son or daughter ever needs an amazingly light and effective insole to make their shoes more comfortable, the ergonomic our pu insole is your move!