@LorraineHirsch @kastin83 @JoustingJim @BallouxFrancois @paulkrugman If it fits properly you shouldn't need that. But the situation is very problematic, with free N95s being distributed with no regard to fit and no consistent availability of specific models (if someone knows what fits).
@LorraineHirsch@kastin83@JoustingJim@BallouxFrancois@paulkrugman如果它合适的话，你不需要它。但这种情况是非常有问题的，免费的N95在分发时不考虑合身性，也没有特定型号的一致可用性（如果有人知道什么适合）。