# Mask

`import { Mask } from "destack:math";`

Vector mask type.

```ds title="Mask"
export type Mask<const N: usize> = Vector<boolean, N>
```

[language/library/src/math/vector.ds:11](https://github.com/destack-sh/destack/blob/main/language/library/src/math/vector.ds#L11)