The Sof Sole Ultra Arch Inserts are shoe inserts designed for use by individuals with lower extremity disabilities. Made of Gelastic, a self-adjusting material, the ultra slim cobra-shaped design solidly supports and cushions without altering the fit of shoes, even high heels. The patented cut out profile cradles the heel, absorbing shock while increasing stability. These inserts mold to the shape of the arch and will not compress or wear down. SIZES: Based on men's and women's shoe sizes.