Rally Armor Mud Flaps For Subaru WRX are constructed from polyurethane and designed to perform consistently off-road or on the highway. The flexible UV-resistant urethane is abrasion-resistant and durable. Providing drivers with four-corner protection, RA mud flaps are crafted for variable temperatures. They help to protect against salt, spray, tar, grime, and paint-damaging gravel that wears your Subaru's finish away. The strong urethane construction maintains its form through all weather conditions, unlike vinyl and rubber which manifests steady, visible material curling and wear over time.