Crochet knit uppers (composed of a wool blend) and a sheepskin sock liner for extra comfort. A light and flexible outsole along with a suede heel guard provides durable wear all season long. Detailed with 3 oversized wood buttons, allowing it to be styled buttoned up, slouched down, slightly unbuttoned, or completely cuffed down to expose two small buttons. When the boots are pulled straight up they are about 15 inches tall. The opening at the top is approximately 14 inches. These boots are hard to size. They basically run true to size, but are a bit on the wide side so narrow feet will need to go down a size. Extremely wide feet will need to go up a size. For normal to wide feet if you are a half size go up to the nearest sise. IMPORTANT INFORMATION! This boot is not waterproof. To be worn in dry conditions. This is a nice boot for Spring or Fall. The insole is sheepskin the shaft is not. This is one of the most popular additons to the UGG family.