Give your casual look a fashionable twist with the UGG Aviva Mid Calf Boot. This lightweight boot features the Treadlite by UGG outsole, which provides durability, cushioning, and traction, and the sheepskin insole and lining, which ensure ample warmth in chilly weather. 10mm sheepskin insole Treadlite by UGG outsole 10mm mouton sheepskin lining Embossed detail on inner shaft Metal zipper on lateral shaft Leather-wrapped binding Leather heel label with embossed UGG logo.