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Chapter 1: Issues related to product ordering

Please find the order confirmation notification email sent by the Net Convection System in your email mailbox, and click "View Your Order" to check the order status. (If you don’t find the letter, please check your spam. If you still can’t find it, you can send us a private message with your recipient’s name and let us check it for you)

Please reply directly to your order confirmation notification email and inform us to cancel the order. We will cancel it for you within 1 working day. You can also call the customer service hotline 02-89769328 extension 701, and a dedicated person will serve you.

Yes! Please see the sales page for details~

Textile products come with a 6-month warranty! Please log in to the warranty according to the warranty card included with the product you received.

If you lose the small card, you can also click the link on the right to fill out the warranty login form ( please click here for the warranty form ), then follow the instructions to complete the content and send it.

Chapter 2: How to use a net convection mask? Can it be prevented?

WHO has four requirements for whether cloth masks have epidemic prevention capabilities:

  1. At least three layers of structure | The net convection nano protective layer has a structure of more than four layers, plus the surface fabric/lining fabric, it reaches 6 layers, which is fully in compliance with the specifications.
  2. The lining has adsorption capacity | The lining of the net convection mask is made of moisture-absorbing and sweat-wicking fabric and is treated with antibacterial to prevent bacteria from breeding easily.
  3. The middle layer has filtration capability | The middle layer of the net convection mask is made of Xpure washable filter material, which has passed the U.S. VFE/BFE/PFE & CNS15980 standards and can easily filter extremely fine particles.
  4. The surface fabric is not easy to absorb substances, such as polyester fiber | All Net Convection masks are made of polyester fiber type surface fabric, which is breathable and not easy to absorb fine substances.

Yes, we have sent the filter materials to the ASTM standard test of Nelson Laboratory in the United States, and obtained BFE (bacterial filtration efficiency) > 99.9%, VFE (virus droplet filtration efficiency) > 99.9%, PFE (particulate matter filtration efficiency) > 99.7%. ( Please refer to this page for relevant test reports )

Regarding this point, because we are not medical equipment, we cannot directly claim to have anti-epidemic effects due to regulations . It can only be said that ours is a non-medical grade fabric mask that can resist PM2.5, dust, oil droplets, liquid droplets, liquid penetration, and pollutants from contacting the mouth and nose, and can be washed and disinfected repeatedly. The Food and Drug Administration announced on February 26, 2020 that masks that can resist PM2.5 also have a certain protective effect against the epidemic. (Please click here for related news) Net convection masks, taking the G2 version as an example, have passed the CNS15980 national anti-haze certification level B (protective air tightness > 88%, salt spray filtration > 95%, oil mist filtration > 90%); Using the filter material, the protective efficiency of CNS14755 mask was also measured to be >95%, and the bacterial filtration efficiency of CNS14775 was >99.9%; and obtained through the Nelson Laboratory in the United States in accordance with ASTM international standards: BFE (bacterial filtration efficiency) > 99.9%, VFE (virus filtration efficiency) ) > 99.9%, PFE (particulate filtration efficiency) > 99.7% , making it the mask brand with the most complete inspection report on the market.
(Please see this page for the complete scanned file of the relevant inspection report)
In addition, the net convection filter material is made of hydrophobic nanofibers stacked and woven, which does not rely on static electricity. It has excellent water repellency and can withstand repeated washing up to 200 times. It is very suitable for use in daily life to isolate all kinds of pollution. Sex masks.

Net convection masks do not have a medical device brand name, so they are not medical masks. Although we have tested some medical masks and passed them successfully ( see this page for related reports ) . But there are two main stages for becoming a medical device: 1) passing factory inspection, 2) passing product certification. Only those who pass the first stage will receive a medical device manufacturing license, and only products that pass the second stage can apply for a medical device trademark. We have only tested the second phase. In the first phase, since a clean room is required, and medical masks have become a taxable and controlled item after the epidemic, it is currently not possible to apply for a medical device trademark.

Currently, only the G3 version has passed all requirements. The G1 and G2 versions have not tested all items, but they have tested the most important filtration items and obtained a filtration efficiency of more than 99%. ( Please refer to this page for related reports and data )

Yes, we have sent the filter materials to the ASTM standard test of Nelson Laboratory in the United States, and obtained BFE (bacterial filtration efficiency) > 99.9%, VFE (virus droplet filtration efficiency) > 99.9%, PFE (particulate matter filtration efficiency) > 99.7%. ( Please refer to this page for relevant test reports )

Wear it only for commuting every day and wash it once every three to five days. However, if you go into a closed public place or medical institution and may come into contact with germs, it is recommended to wash it immediately when you go home that day!

Cleaning method : It is recommended to wash by hand gently, and use surfactant such as soap or laundry detergent to scrub both sides of the mask until it is completely lathered. Please rub it for at least 30 seconds, then rinse it with running water, and finally wring out the excess water with appropriate force. Then hang to dry. You can also use a washing machine to wash, but you need to use a laundry bag (preferably a hard-shell type) for protection, and try to set it to "gentle wash" to avoid product damage caused by excessive cleaning power of some brands of washing machines. (Note that you do not need to remove the anti-fog air-tight patch when cleaning the mask, just wash it together)

Disinfection method : If it is not convenient to clean at the moment, you can use 75% alcohol, hypochlorous acid water or diluted bleach water to spray a sufficient amount on both sides to disinfect. You can also use low-heat sterilization below 80 degrees Celsius, which will not affect the filter material. Only products using "thermal bonding" technology such as the Anti-Haze Magic Bandana V2.0 and Ultra Black model, please avoid using alcohol for disinfection, as this may cause the hot bonding adhesive to dissolve and lose its stickiness.

Ultraviolet light exposure can also sterilize, but since the effect is difficult to verify and it is not our area of ​​expertise, we do not recommend it at the moment!

The water-repellent function of the net convection mask comes from the layer-by-layer stacking of special water-based nanofibers, and its water-repellent capability is much greater than that of ordinary cloth masks. Since the filter material will be pulled during the washing process, resulting in the increase or increase of pores, the water-repellent ability may be slightly weakened with the number of cleanings, but the hydrophobicity of the filter material itself does not change with the number of cleanings, so no matter how many times it is cleaned, it will remain the same. It can also maintain a certain degree of water resistance.

There are six types of net convection masks: Basic, All-fit, Beauty, Elite, Urban, and Athlete. All six models use Xpure nano-protective layers, which have good resistance to liquid penetration. Among them, the Basic model uses G1 filter material, the Athlete model uses G3 filter material, and the other four models use G2 filter material. ​G1 is CNS15980-D grade, with a comprehensive filtration efficiency of about 88%; G2 is CNS15980-B grade, with a comprehensive filtration efficiency of about 95%; G3 is CNS15980 A grade, with a comprehensive filtration efficiency of about 99%. The main reason is that there is a slight difference in filtering ability, but the water-repellent ability is almost the same. Among them, the Athlete model is special. It has the national sports patented XFLO system, which is specially designed for high-intensity exercise and can be worn for a long time without feeling stuffy!

On this page ( please click here ), scroll down and you will see a "Comparison table of net convection textile anti-haze products", where you can see the differences between each model more clearly!

The net convection anti-haze series products all use similar Xpure nanometer protective layers, so there is not much difference in filtration efficiency. There is only no pressure strip on the nose side of the Magic Bandana. Without the anti-fog air-tight patch, the air-tightness will be worse than other products. It is probably on the same level as ordinary medical masks, but it is enough to block suspended droplets.

If your ear straps are sewn shut (purchased in 2017), you can cut off the visible ear straps and replace them with new ones yourself. If your ear straps are not sewn shut, you can directly take them off and replace them with new ones. If you are not familiar with wearing ear straps, you can refer to the instructional video we shot ( please click here ), which demonstrates how to replace ear straps and loops!

If the nose side pressure strip is broken, the repair cost is too high and the mask structure may be damaged, so we do not recommend repairing it. If the login warranty proves that it will break within six months, please send us a private message for compensation measures. If it has been more than six months, it is recommended to apply an "anti-fog airtight patch" to replace the broken batten. The effect is very good!

Chapter 3: How to buy overseas? Can I buy it in Hong Kong? Where to buy? How long will it take for it to arrive?

OK! Please select the products you want to purchase, add them to the shopping cart according to the quantity, and then check out together.

  1. Please select the area you want to ship to in the shipping address field.
  2. Free shipping for orders over NT$10,000. For orders under NT$10,000, shipping is NT$200. Shipped using "SF Express".

OK! Please select the products you want to purchase, add them to the shopping cart according to the quantity, and then check out together.

  1. In the shipping field, please select the area you want to ship to.
  2. Free shipping for orders over NT$10,000. For orders under NT$10,000, shipping is NT$800. Shipped using Linex logistics service, safe and guaranteed.

At present, the goods can be shipped within 1 week after placing the order. It will take about 7-12 working days to receive.

Yes, Net Convection has the following distribution points in Hong Kong. Please check whether it is in stock before placing an order:

Online channel :

(1) Life Shop HK

(2) HKTV mall

(3) Green Recipes

Physical access :

(1) Organic We : Room 1601, 16th Floor, Good Hope Building, 5 Sai Yeung Choi Street South, Mongkok, Kowloon/ Organic We

(2) Xiju Life : Hennessy Integration Center UG/F, UG6(3) City'Super chain store, 302-308 Hennessy Road, Wan Chai, Hong Kong

Other relevant supplementary information

Net convection water repellent ability experimental video vs. N95 & cotton masks

Unboxing-Urban masks revealed

Antibacterial Shield Spray | Q&A Summary

Mask quick accessory holder | Unboxing test video

Anti-haze sports mask Athlete | Fundraising promotional video

Anti-haze sports mask Athlete model | Tested by national triathlon athletes