SKYTEC ASF 3V FFP3V Fold Flat Dust Mask with Valve (BOX of 15) Size:M Skytec Face Fit test kits SKG00006GF Skytec Face Fit test kits enable a qualitative respiratory fit test for tight fitting FFP's and negative pressure half masks in line with the COSHH (Control of Substance Hazardous to Health) and the Approved Code of Practice (ACoP) regulations for the mandatory testing of respiratory protective equipment (RPE) dry and protected The ASF 3V FFP3 Respirator is a vertical fold flat disposable respirator designed with an inner face seal adjustable straps and two size options to offer an excellent fit for all face shapes