In winter, insulation against cold, in summer, protection against sunlight. The mats are hung (without screws or drilling) in the door edges and clamped with rubber tensioners. The door pockets are adjustable, so they also fit comfortably over a mounted blackout system. Four Seasons are made from weatherproof thermal foil with UV stabilised polyester film on both sides, the front can be opened. For Leisure Vehicle: Box Truck Material: 100% Polyethylene Vehicle Model: VW Crafter (2017 - ).