While Mouse attributes provide a way to name your accessors, readers, writers, clearers and predicates, MouseX::NativeTraits provides commonly used attribute helper methods for more specific types of data. As seen in the "SYNOPSIS", you specify the data structure via the traits parameter. These traits will be loaded automatically, so you need not load MouseX::NativeTraits explicitly. This extension is compatible with Moose native traits, although it is not a part of Mouse core.