If you purchase 3 boxes, you will receive a 1 box service campaign. This three-layer mask is made in Japan with all domestic materials, including non-woven Toray fabrics. VFE test (virus flight capture efficiency) over 99% BFE test (bacteria collection efficiency) over 99%. PFE test (particulate gathering efficiency) over 99%. Made of soft flat rubber that stretches 0.2 inch (4 mm) wide and reduces strain on the ears. The surface of the vanity box is antibacterial for hygienic storage. This mask is silky soft to the touch.