I own both the dark chocolate brown and the black in these awesome boots!  They are extremely cute and comfy!  They also have the work out sole similar to the sneaker...but I have to say I have not walked for long distances in them to really give an honest judgement on the workout aspect...(but the sneakers are awesome for that) They also have a zipper on the side and adjustable strap for larger and smaller calf adjustment.  These are the most used boots I own because they are extremely cute and comfortable.  They have helped me with my posture tremendously.