Exhale valve lets workersbreathe easy and stay cool Shell resists collapsing in heat and humidity Molded nose bridge seals easily No metal noseband Contours naturally t your face for less pressure Straps are securely attachedso they don’t break at the seal Softspun® lining for increasedcomfort and durability Soft foam nose cushion for added comfort NIOSH certified Filters 95% or greater non-oil based particulates Certified under 42CFR84 Meets heat and flame resistance in accordancewith ANSI/ISEA 110-2009 Section 7.11.1 Suitable for most welding applications 100% PVC-Free Applications: Grinding Torch cutting Sanding Metal pouring Sweeping Metal working Bagging Foundries Stone Quarrying Agriculture Metal machining Construction sites Cement Ceramics manufacturing Underground mining Timber/Lumber mills Polishing Buffing Lime Poultry Textiles Welding Brazing Soldering