Abstract: A protective cover for a limb, cast or the like including a bag of flexible material substantially impervious to an element to be protected against. The bag includes an opening through which the limb or cast to be protected may be inserted and on the interior of the bag, adjacent the opening, is provided with mating fasteners so that the internal sides of the bag may be fastened together to conform the size and shape of the opening of the bag to the size and shape of the limb or cast on which it is worn. The exterior of the bag opposite the internal side mentioned above define a flap which in turn carries a first fastening device. A second fastener is disposed on the bag remotely from the first fastener and may be engaged by the first fasteners to hold the flap against the body of the bag.