These boots feature a smooth suede upper and are lined with soft sheepskin, while the EVA sole has an innovative convex shape that follows your every movement. Perfect for everyday use, they adapt to various occasions. UGG women's size conversion: 5US = 3 UK; 36 EU 5.5US = 3.5 UK; 36.5 EU 6US = 4 UK; 37 EU 6.5US = 4.5 UK; 37.5 EU 7US = 5 UK; 38 EU 7.5US = 5.5 UK; 38.5 EU 8US = 6 UK; 39 EU 8.5US = 6.5 UK; 39.5 EU 9US = 7 UK; 40 EU 9.5US = 7.5 UK; 40.5 EU100% Chamois, 100% Wool, 100% Nylon