Frequently Asked Questions

1. What size should I order?

We recommend large for men, medium for women, and small for children. Please check our size chart below.

• Small: W 6.7 in (17 cm) x L 3.9 in (10cm)
• Medium: W 7.5 in (19 cm) x L 5.1 in (13cm)
• Large: W 9.1 in (23 cm) x L 5.5 in (14cm)

2. What fabric is the mask made of?

The mask and filters are 100% cotton. Our copper ion fabric filter is a combination of cotton and copper ion fiber that has powerful antibacterial, antimicrobial, and deodorizing benefits. Our copper ion fabric filter has been certified by the Korea Apparel Testing & Researching Institute (KATRI).

3. How do I wash the mask?

Hand-wash the masks and filters with soap. We recommend hand washing for longevity, although our masks are well structured and durable.

4. How often should the mask be washed?

We recommend washing the mask and filter at least once a day to keep the inner lining, the filter, and the outer surface clean.

5. Is it reusable?

Yes! You can reuse the mask after washing it. 

6. Who is the mask for?

Anyone can wear our masks - they're a sustainable way to protect ourselves and our families. The masks are not intended for health-care workers. 

7. When will I receive my order?

We will process your order within 1 business day.  Please see below for shipping rates and arrival timeline:

Standard - $4.90 shipping rate (3-7 business days)

Order value of $40 or more - FREE Expedited Shipping (3-5 business days)

Thanks to support from our customers, we have expanded our warehouse capacity to 18 different locations in the U.S.

We realize how volatile and unstable the logistics situation is due to Covid. With our expanded network of warehouses closer to our customers in the U.S., we hope to provide customers with faster and more reliable shipment. At the same time, however, our customers could see some split-shipment for their orders as certain SKUs may not be available in all warehouses. Thank you so much for your understanding.


8. Do you ship internationally?

Unfortunately, we currently are not shipping internationally. We work with retailers abroad so please email us at for opportunities.


9. Can I return the mask?

No, all sales are final and cannot be returned given the current situation. If you receive a damaged product, please contact us at


10. How can I order in bulk?

For any orders over 50, please contact