Awarded the Seal of Acceptance from the American Podiatric Medical Association (APMA). Breathable mesh upper with synthetic overlay. Elastic laces with an adjustable hook-and-loop closure. Padded tongue and collar for added comfort. Breathable mesh lining and cushioned insole. Ultra Light Technology with flex grooves to promote natural foot movement. Flex Fit System allows for additional insoles to be inserted or removed for a custom fit as your child's foot grows. These insoles can reduce or increase the size of the shoe by almost a half a size, which extends the life of the shoe. Durable nonmarking outsole.