3/4 Orange Insole better fits open-toe sandals. Supinating channel-shaped insert. Heel and metatarsus supination 10 mm. Usage — in instep validity, longitudinal flat feet, knees validity, and transverse flat feet. If you wear Memo shoes and after two weeks of wearing the shoe appears abrasion in zone 3 or 4 of the sole you need to wear Memo shoes with Memo Orange Insoles. They secure and form the back of feet and instep. Profiles the feet shape and metatarsus. Contributes to proper transversal and longitudinal plantar arch shaping.