The external part of WPlus ( the elastic cover ) can be washed in safety by hand or in the washing machine at a low temperature and with any sanitizer. Then it can be left to dry by hanging it. Do not dry in the dryer. The cover is washable and reusable until it shows signs of deterioration.
Interchangeable internal filter: each filter maintains its maximum filtering capacity for up to 120 hours of use. After which it needs replacing.
Storage and further use: make sure both the filter and the cover are completely dry before using. You can safely store your Wplus in its original bag when not in use.