A silver ion, anti-bacterial & washable cloth mask made in Taiwan Developed with patented German Ruldolf Silverplus technology Outside material: nano silver ion fabric Inside material: nano photocatalyst fabric Offers anti-bacterial, dust filtering & air particles blocking properties Skin-friendly, highly-breathable & able to absorb moisture of breath Lineless, 3D & single-layer design with elastic ear loops Size: 34 x 12 cm with an extra-large area of protection: 306cm2 Ensures hygiene & freshness for more textile comfort with Oeko-Tex Standard 100 Features outstanding resistance to washing & dry cleaning Washable for more than 100 times at 60℃ Non-surgical grade, for adult use & should be rinsed with water 1-3 times each week