Yes! The Skiin Pod is designed for interchangeability between garments. So if you initially purchase a pair of underwear, and then purchase a bra or tank top separately, you can use the initial Pod in either garment. All garments capture the same biometric data, so you can choose whichever you are comfortable with on any given day.
To switch a Pod from one garment to another, simply insert the Pod in the garment's dock and navigate to the Devices page in the app. Tap on the device to switch to the garment you are using.