Vans Mid Slip - Men's Warmth, fashion, and functionality unite for the Vans Mid Slip - a shoe as rugged as it is good-looking. Water-repellent pigskin suede upper with fleece lining keeps you warm when the temps drop. Heat retention layer between the sockliner and outsole keeps the feet warm and dry. Reverse lug waffle Sole Grip for grip in winter's slick conditions.