Edge pro: building on the success of the meredith, the new edge pro is a convertible mule style with the same flexible and supportive bottom as the meredith. The sole has a new tread design that is now both water and oil slip resistant. Also new - edge pro is available in both women's and men's sizes! some of the sizes are unisex: for example, size 12 womens - 10 mens will fit a women's size 12 and a men's size 10.