Like other ugg boots,a pair of Ugg Classic boot is featuring the Twin-faced sheepskin uppers,EVA insole ,Molded rubber sole,insole is made of sheepskin.The different thing is that there is side zapper in the vamp,which makes a pair of UGG Classic easy on/off .Outsole is EVA with molded rubber pod inserts that provide durability and better traction.Now Our Ugg Classic 5817 Boots are availalbe in Black,Brown,Chustnut,and Sand.