Proprietary compound which increases cushioning and traction for a supremely lightweight, ultra-durable sole. Sheepskin Lining Vetted through extensive, industry-leading processes to ensure only the highest quality sheepskin makes the cut, delivering the signature feeling of UGG. SugarSole™ The sugarcane in our SugarSole™ foam allows us to reduce dependency on fossil fuels by replacing petroleum-based ethylene, absorbing 1.6 pounds of CO2 for every pound of ethylen