# sleepThreshold

> A speed threshold below which the body is allowed to sleep, in meters/sec.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.5/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public float sleepThreshold { readonly get; set; }
```