Pemko 2343av36 door shoe Mill Aluminum with black eco-v insert. Door shoes help block the transfer of noise, light, dirt, moisture, or air through the gap between the bottom of a door and its threshold. shoes are attached along the width of the door or fastened to the lower edge of the door. They include weather stripping, an insert, or a flange that reaches from the underside of the door to the threshold, closing the gap. some door shoes include a kick plate, which helps protect the lower portion of a door from damage.