In essence, the exhalation air goes through the valve and the filter with filtration efficiency of 99,9%. Low breathing resistance to reduce the risk of user fatigue and to add additional comfort. Tight fit respiratory protection Half Face Mask. Filtration options for P100, OV, OV/AG, Multi-Gas, & Nuisance Odor. Compact, lightweight & flexible The Health and Safety division of GVS designs and manufactures filtration devices for personal and collective respiratory protection. GVS is a global group that has been producing highly technological diversified filtration solutions for more than 40 years. Order GVS Masks and Filters | Workwear Express Half mask GVS Elipse SPR488 with ABEK1 filters, size M/L This mask is recommended for everyday use for respiratory protection against micro organisms down to a size of 0,3µ. The Source Control Exhalation Filter reduces cross contamination risks to those around them. Filters can be easily replaced. GVS Elipse Mask With P3 Filters GVS SPR487 Elipse Mask With ABEK1 Filters For Multiple Gases And Industrial Safety Mask Blue Made from soft thermoplastic odorless elastomer that is hypoallergenic (without latex and silicone) and an easy-to-adjust headband.