The UGG Classic Ultra Mini Boots 'Grey' for women is a popular choice with its signature sheepskin and flexible, ultra-lightweight sole. This boot features an asymmetrical topline and a rear pull tab. It's treated with a water-repellent layer and has a 17mm sheepskin lining. The sole is made of sugarcane EVA or Treadlite by UGG EVA, providing comfort and durability.