WLS14140147 / 14140147 RESPIRATOR HALF MASK SZ LARGE ValuAir® Plus 6100V Series Halfmask Respirator ValuAir® Plus is value with improved performance at a reasonable price. For greater comfort and less fatigue, this reusable respirator uses lower breathing resistance T-series cartridges, which audibly lock into place for correct installation. Made of Thermoplastic Elastomer (TPE), the ValuAir Plus has many features designed for comfort and convenience such as an improved sliding suspension system and a soft sealing flange with rolled edges. ValuAir® Plus dual cartridge half mask respirator is available in three sizes. Made in USA. NIOSH approved.