HeatTrak Snow-Melting Traction Mats prevent snow and ice accumulation on walks, ramps, and entrances. Available as walkway, door, and stair-tread mats, HeatTraks plug into any 120- or 240-volt outlet to melt snow at a rate of 2 inches per hour. They are made of non-slip, UV-protected rubber so can be left outside the entire winter season, are available in different widths and lengths and, although portable, have reinforced grommet holes for securing in place if so desired.