The AirQueen Nano Mask Diaries
N95 manufacturers typically deliver Guidelines for the prompt length of use for their masks on the box or online. But usually, you need to toss out your N95 if it will get ruined — crumpled up in your bag, one example is — or If you're able to no more reach a decent seal on the face. It's also advisable to exchange your N95 if it will get wet,