SoftSeal 10 PK Extra Large (XL) N95 Valve Mask. The 360 degree silicone seal molds to your face maintaining the seal even while speaking or moving. As you inhale, the thin feathered edge of the silicone seal tightens to your face. Molded in adjustable nose clip can be shaped to your nose and won't peel off. Internal skeleton prevents mask collapse while breathing and improves the mask's durability. No fog design keeps goggles and glasses fog free. Provides protection against airborne bacteria, molds and viruses including H1N1 and swine flu. Protects against allergens, smoke, ash, soot and fine particle air pollution. Meets CDC guidelines for TB exposure control.