Incorporating a soft, hypo-allergenic facepiece material and a central exhalation valve, it is cool and comfortable to wear. The 6000 Series half mask is used with twin light-weight filters, one each side of the facepiece, which click securely in place by using the 3M bayonet attachment system. The half mask is compatible with the new 3M S-200 Supplied-Air System. Approval: EN 140. Filters are sold seperately, see stock numbers A26110 to A26122