In house Batch tested for critical performance req uirements. Half mask Face-piece in soft TPE material (Thermoplastic Electrometric) in Grey colour material. Produced from non-allergic, Soft and odourless material to ensure high comfort. Light in weight . Easy to use and well balanced. Economical. Low maintenance. Exhalation valve to allow efficient escape of exhaled air containing CO.Promotes easy communication Sweat port in the face piece for hot and humid environment. Gas Filter and Particle Pre- filter can be combined. Pull type strong, adjustable elastic gives snug fit yet relives strap pressure.