Red Rubber can be obtained from stage V1: 16-8 Reunion in the Forest (Princess).
A red bracelet.
Used to craft: Edit
- Sweet Coronet - 5 needed
The other parts of this suit are Unrestrained Smile, Super Battery, Gear Denim, Dark Pattern Denim, Slovenly Look, Gear Canvas, Eye Protector, Golden Gear, Gloves of Mechanics, Red Pipe Tongs, Staple Gun, Follow Your Heart and Mysterious Band Aid.