4 ms·N95s often have exhaust filters which make a surgical mask safer for everyone else around you.by berberous 5y agoN95s often have exhaust filters which make a surgical mask safer for everyone else around you.Vecr 5y agoYou can put tape over the valve on the inside and the outside and that works fine.TylerE 5y agoIt's quite easy to find ones that don't.