Level up on your mask with this 3-layered copper infused face mask individually packed in opp bag. Copper has been known to have antimicrobial and antibacterial qualities, and studies show that virus stays shorter on copper surfaces. This mask is reusable and infused copper remains the same even with several washes. Your own design or logo can be printed on the whole mask area. Layers: 1st: 100% copper cotton; 2nd: removable PM2.5 filter; 3rd: 100% cotton. Also available in smaller size for the same price. Storage: After each use, lay the mask flat and store it in a clean, dry and ventilated place. Washing instruction: Hand wash. After one to two weeks (depends on the wearing time), soak the mask (filter removed) in 176° - 194° F / 80°- 90° C of water for five minutes. Avoid hard rubbing and using washing liquid. Dry naturally. For General Public Use Only (Non-Medical Use)