WP Standard Mr. Grumpy slippers. The leather lining and cushioned heel allow for extra comfort - especially as they break in and adjust to the contours of your feet. Upper olive green suede with leather interior lining. Marked WM. (womens medium) I wear 8.5-9 and feel i need to size up a size. This pair is in extreme light used condition due to sizing basically like new. These could be worn anywhere not just as slippers.