The Trend Air Stealth Half-Mask protects the user against Airborne Particles, Oil Aerosols, Mist, Welds & Fumes. It is fitted with a Twin HEPAC pleat encapsulated filter, that provides 99.99% filtration of Airborne Particles & Aerosols at 0.3 micron and above. The Exhalation Valve is located at the bottom of the face piece, and this helps to prevent exhalation fumes steaming or fogging glasses / visors. The Protective Grill covers 100% of filter surface, protecting the filter from moisture and particulates, ensuring it performs better in clogging pressure and filtration efficiency. Specification: Weight : 131g Size : Medium / Large Assigned Protection Filter : BS EN143 P3R Conforms to Half-Mask Standard : BS EN140 This Product Includes: 1 x Pair of P3 Filters (Standard) 1 x Additional Pair of P3 Filters (Promotional) Please Note: This product is not for use with asbestos.