CLARKS Exton Walk Derby shoes: Leather uppers. Leather lining. Leather cushioning with Ortholite technology. Rubber outer sole. Lace-up fastening. Classy smart shoes in quality aged-effect smooth leather with a simple & timeless design. Look just as good worn with a suit, jeans or chinos. As an added bonus, they have cushioning with Ortholite technology for unrivalled comfort! Ortholite technology: Built into the shoes, it provides strong support & reduces pain for longer than basic shoes, whilst the environmentally friendly anti-microbial treatment helps fight odours. Ortholite quality soles use special foam made from polyurethane which is renowned for reducing pain, even after a year. Pain is reduced by up to 95% compared to 30% for certain normal EVA soles. Ortholite cellular foam is also light & breathable which enables air to pass through the shoe & allows excess heat & moisture to escape from the shoe for maximum comfort.