Winter means snow, ice, and slush for many people, so your shoes are likely to be wet when you enter your car. Floor mats that are carpeted will absorb moisture but are likely to remain wet and soak through to your car floor. Plastic or rubber floor mats, on the other hand, will keep the water contained as the snow and ice melt but won't get the rest of your floors wet. You can easily pour the water off the mats and onto the ground outside.