The rugged full grain leather uppers feature a padded collar for ankle protection and better fit, along with a mesh lining allowing your feet extra ventilation as you move.The removable footbed is made of Ortholite an extra-durable cushion that includes recycled rubber to add shock absorption while the structure of the foam wicks away moisture so your feet stay cooler and dryer. Washing this won't change its shape or resilience, and its anti-bacterial properties won't wash out. Translation: your feet feel fresher and less tired throughout the day.