The sandals in the image are the classic BIRKENSTOCK clog model, the "Boston." The Boston is characterized by its rounded shape that covers the toes and instep, and an adjustable strap. The upper material uses high-quality oiled nubuck leather, etc., which gains character the more you wear it. In addition, BIRKENSTOCK's unique footbed is made of a mixture of natural cork and latex, which fits the shape of your foot and provides a comfortable fit. Color: Navy系 (Navy-based) I think I've worn them about 10 times.