Nyloflex Shell: The semi-flexible Nyloflex shell cradles and supports your heel and arch, providing secure and natural alignment. Arch Support: The longitudinal arch support system reduces strain on your arches and helps prevent discomfort. Heel Cup Construction: The integrated heel cup absorbs shock and redistributes forces evenly, minimizing trauma and providing comfort. Top Cover: The Cartex top cover is both odour-inhibiting and antibacterial, ensuring freshness and hygiene. Design: The sleek and slim design makes them suitable for a variety of shoe styles, from casual to dress shoes. Size: Medium UK: Female 4-7 US: Female 5-8