The Breathe Free N95 Respirator is a premium product at a great value. The reinforced outer shell resists structural collapsing that can be brought on by increased humidity. The wearer will breathe easier with the exhalation valve, also providing prolonged life of the product. The wearer also gets great fit and comfort from the adjustable nose clip with foam liner and non-irritating inner face piece. These respirators are packed 10 masks per box, 8 boxes per case. NIOSH approval: N95.