From Vionic, the Rochelle Leather Buckle Strap Tall Boots feature: Premium leather upper Side zip closure Non-functional decorative buckle detail Synthetic lining Built-in VIO MOTION Technology footbed featuring contoured arch support, shock-absorbing cushioning, and a deep heel cup to provide stability & forefoot flexibility Durable rubber outsole Approx. 15" boot shaft height Approx. 15" standard calf shaft circumference Approx. 17" wide calf shaft circumference Approx. 1.0" heel height Imported. Styling Notes: It is recommended to wear your new pair for a few hours to allow your feet to adapt to the new support.