insoles are designed to offer comfort and support for children's growing feet. With Progressive Arch Design™ insole technology, the arch height of each progressive size increases as a child's foot grows. Use them to relieve common muscle fatigue from excess foot motion, maintain proper alignment and balance, and support the arch and stabilize the heel. Shock-absorbing outer layer offers comfort. Inner layer gives gradual, flexible support. Non-toxic, hand washable. 3/4 length will fit into most enclosed shoes. Not made with natural rubber latex.