# isValid

> Check if the AABB is valid. To be valid, PhysicsAABB.upperBound should be equal to or above PhysicsAABB.lowerBound.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.LowLevelPhysics2D](/engine/6000.3/script-reference/unityengine/lowlevelphysics2d.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public readonly bool isValid { get; }
```