Yes, the exterior mask is washable.
The replaceable air filters, which you take in and out of the mask, are not washable. Dogs tend to slobber when breathing or panting so we designed the K9 Mask to be washable to keep it fresh and clean for long-term use.
Before washing the K9 Mask remove the air filter.
Wash in cold water with a mild detergent.
Hang to air dry.