The Naot Viento is the perfect mid-calf boot. This style has an inside zipper for accessibility and gore for adjustability. The Viento features padded technical lining providing comfort, warmth and moisture absorption. Naot's removable, anatomic cork and latex footbed is wrapped in leather and molds to the shape of the foot with wear. The Aura Collection features a 1.5'' polyurethane sole with a metal shank which is extremely lightweight, durable and abrasive to prevent slipping. This collection uses a hand-sewn stroble construction making it strong and extremely flexible. Material: Leather.