# Sandbox.Rigidbody.SleepThreshold

```csharp
float SleepThreshold { get; set; }
```

The speed threshold below which this body will be put to sleep. Units per second.
Increase this to make the body sleep sooner, which is useful for stacking stability.

Declared in [Sandbox.Rigidbody](/api/Sandbox.Rigidbody).
Assembly: `Sandbox.Engine`.