# Sandbox.PhysicsBody.SleepThreshold

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

The speed threshold below which this body will be put to sleep. Units per second.
The default is about 2 units/sec. Increase this to make bodies sleep sooner, which is useful for stacking stability.

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