Focals are designed with protection from water, dirt, and grime with an IP55 rating.
Loop is IP66 rated. While both Focals and Loop are water resistant, they are not waterproof. You can wash your hands while wearing your Loop, but don't go swimming or submerge it.
The battery case is not IP rated and is not waterproof.
For more information about the IP ratings and device specifications, see our Important Information Guide.