Tender For supply of surgical mask 3 layers with antibacterial filter for surgeons. disposable thr ee-layer mask consists of two layers of non-woven fabrics and a piece of filter paper capable of filterin g out bacteria at a rate of 96percent and above and good air permeability comfortable to wear dust pr evention and sterilization. environment friendly and wholly plastic strip is adopted for the part over th e bridge of the nose so it can be adjusted at will to fit the line of bridge of nose without glass fibres hy poallergenic. ]