PL 400 Sensor Mitts Men's Black - XL. The warm, touch-screen-compatible PL 400 Sensor Mitts are made with a smooth 300-weight fleece outer and a 100-weight fleece liner. A Sensor™ palm-tip allows the use of touchscreen devices without the need to expose your hands to the elements. Wear this insulating, heavy-duty liner with a waterproof shell or alone during a cool-weather hike.