---
title: groups
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/clothcollisionfilter/groups
---

# groups

The set of collision groups, stored as a bit mask, to which the entity belongs.

## Declaration

```swift
var groups: ClothCollisionGroupSet
```

## See Also

### Configuring collision groups

- [mask](realitykit/clothcollisionfilter/mask.md)