Like other ugg boots,a pair of Ugg Classic boots is featuring the Twin-faced sheepskin uppers,EVA insole,Molded rubber sole,insole is made of sheepskin.One of UGG Australia's original heritage styles, the Ugg Classic Short a calf height boot features genuine twin-face sheepskin and our signature UGG woven label. All boots in our Classic Collection feature a soft foam insole covered with genuine sheepskin and have a molded EVA light and flexible outsole designed for refreshing comfort with every step.