UGG Rainier 5189 Boots are made with the finest quality twin-faced sheepskin and detailed with a furry collar for added style.The wool part of the skin faces into the inside of the boot and so lies against the leg.This results in a warm soft feel to the boot that is found only from wearing Ugg boots. A rugged, molded EVA outsole provides this women's clog with traction and durability while incorporating forefoot flex grooves for comfort.All these ugg boots is individually numbered to guarantee authenticity.