# layerMask

> Sets the contact filter to filter the results that only include Collider2D on the layers defined by the layer mask.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public LayerMask layerMask
```

### Remarks

This field takes effect if [ContactFilter2D.useLayerMask](/engine/6000.0/script-reference/unityengine/contactfilter2d/uselayermask.md) is true.

Additional Resources: [LayerMask](/engine/6000.0/script-reference/unityengine/layermask.md).