We have a requirement for small disposable face masks(FFP3). Our staff include a number of young ladies (and to be honest gentlemen) for whom the standard face masks are just too big and they fail the face fit test as the seal wont form properly (usually under the chin) Does anyone have a source of smaller face masks? I have looked at the Arco catalogue and at 3M but not found anything suitable. I know we can get positive pressure respirators but we would like to try the negative pressure route first.