Why Wonder-C Mask? Copper is directly bonded to the yarn, so it is not lost during washing and boasts the highest copper content in Korea. - Passed the same function retention test after 150 times washing!- Completed of mask safety test- Nose wire that does not get rusty- Breathable mesh lining - Made in Korea- Eco-friendly life Have you checked the copper content?The copper thread content of Wonder-C Mask is 20%. It is not comparable to other low-priced copper-coated masks, masks made with copper powder, or masks containing only 5-7% of copper thread. Do you feel comfortable talking in a mask?The nose and chin part of Wonder-C Mask was specially designed to give enough breathing space, and the mask fits tight on your face. It does not touch your lips, so it’s easy to talk even in a mask, and you don’t need to worry about it rubbing off your makeup. Recommended for- Those who touch a mask frequently- Those who wear a mask for a short time- Those who look for a seamless copper mask- Those who desire to talk comfortably in a mask- Those who look for a mask that all your family can wear safelyHow to useOne line covers the nose, and the other two lines support the chin. Hook the mask strap over your ears to fit your face.Optionally, you can use the ear strap adjusters to make it more close to your face.Warning for washingThe Wonder-C Copper mask is reusable after washing and over 150 times washing, it retains the effects. (Approved by test to maintains the same effect even after washing 150 times)As this mask is manufactured with contains copper , it is recommended to hand wash it gently with the mild laundry detergent in lukewarm water. *Caution*- Contains real copper and may smell of iron.- It is a personal hygiene product and cannot be exchanged or returned after opening.