3M Particulate Respirator 9211+ - N95 - 10 PackParticulate Respirator. Non Returnable. For health and safety reasons, this product cannot be returned unless defective or shipped in error. Particulate Respirator 9211 37022 (AAD), N95 Respiratory Protection, 10 Box. This disposable N95 particulate flatfold respirator features soft inner material and 3M Cool Flow Valve to help provide comfortable, reliable worker respiratory protection. Ideally suited for hot dusty work settings that require long