Moldex 3405 Mask Ffp3V R D Box 5'sMoldex 3405 Mask Ffp3V R D Box 5's Reusable FFPThe washable full face seal and unique pleated filter technology gives you the option of using these masks for more than one shift. The ActiveForm seal automatically adjusts to different face shapes and movements to give a secure fit. The Strap and clip allows you to hang the mask around the neck during breaks. The DuraMesh shell increases shape retention and durabilityThe Ventex valve reduces moisture