Our take on the classic Chukka design is the perfect modern hybrid. Versatile for every day, engineered for all day. This updated lace-up ankle boot features premium leather uppers, our supportive Vio Motion Technology footbed and our lightweight, flexible Uptown outsole. Uppers: Nubuck. Footbed: Removable microfiber wrapped EVA. Durable synthetic outsole designed to withstand every-day wear across a range of surface Leg Circumference: 12.60". Shaft Height: 3.82". Heel Height: 1.37". Built-in VIO MOTION Technology footbed featuring contoured arch support, with shock absorbing cushioning, deep heel cup to provide stability and forefoot flexibility Available in men's whole and half sizes Medium (D) width, sizes 7-14. Each pair of Vionic shoes contains VIO MOTION™ Technology which means that there is either a built-in or removable average orthotic in the footbed. Please learn more about Vionic here.