The Wii Remote's main body and grip are molded from ABS plastic—a durable, lightweight, impact-resistant thermoplastic.
The grip area often features a rubberized coating or textured overmold for improved traction and comfort. Internal components (buttons, sensors, PCB, speaker, rumble motor) use various other materials.
Exact formulations may vary slightly by production batch and revision (original Wii Remote vs. Wii Remote Plus).