Exhalation Valve for Extra Comfort. New Seal Cushion Provides Exceptional Comfort. Dual Head Strap for Optimum Fit. Maintenance-Free. NIOSH Approved TC-84A-3171. For almost three decades, SAS Safety Corporation has been manufacturing and supplying the Industrial, Automotive, Agriculture and Marine Industries with products and equipment designed to make workplaces safer. At SAS Safety Corporation we are dedicated to providing quality products that protect and preserve the most valuable resource on earth: people, As an ISO 9001:2008 certified company, all goods sold by SAS Safety Corporation are carefully manufactured, tested, inspected, checked and packaged by experienced workers, and are as free from defects as possible prior to leaving the factory. We offer a complete line of Respiratory, Hearing, Eye, Hand/Body protection products plus First-Aid Kits, Absorbents, Spill Containment and Safety Accessories.