## Common ground
All options are toe spreaders or correctors designed to align toes and improve foot health.
## Options at a glance
**3926.90 – Made of plastic**
- **Defining trait:** Constructed from rigid or semi-rigid plastic, offering structured support.
- **Typical examples:** Plastic toe separators with adjustable straps, molded arch supports.
- **Best fit when:** Need firm, durable support for conditions like bunions or hammertoes.
**4006.90 – Made of rubber**
- **Defining trait:** Flexible and soft, often providing cushioning and comfort during wear.
- **Typical examples:** Rubber toe spacers with gel inserts, flexible foot aligners.
- **Best fit when:** Prioritizing comfort, flexibility, or use in sensitive footwear.
## Key differences
| Feature | 3926.90 (Plastic) | 4006.90 (Rubber) |
|------------------|--------------------------|----------------------------|
| Material rigidity| Rigid/semi-rigid | Flexible, soft |
| Support level | High | Moderate to low |
| Comfort | Lower (can feel stiff) | Higher (cushioned) |
## How to choose
- Is firm, long-term structural support needed? → 3926.90
- Is comfort and flexibility the priority? → 4006.90
## Overlaps & pitfalls
A product may combine both materials (e.g., rubber padding on a plastic base), making it fit both codes. If so, use the **primary function**: choose 3926.90 if structural correction is key; 4006.90 if comfort and softness dominate. No option is vague—both are clearly defined by material