In response to the ongoing threat of PM2.5, many consumers are turning to masks that are more expensive, complex, and supposedly more effective. However, recent findings from the China Consumers Association and the Shanghai Consumer Protection Committee reveal that not all masks live up to their claims. Their "Comparative Tests on the Protective Performance of 37 Mask Products" have shown that some masks overstate their filtering capabilities. In fact, for certain types of use—like snoring or light dust protection—simple disposable masks may be a better choice.
Disposable masks, made from non-woven materials, were found to offer better filtration performance compared to reusable filter masks. A recent comparative test conducted by the China Consumers Association involved samples collected from six cities, including Beijing, Shanghai, Hefei, Chongqing, Ningbo, and Harbin. The study included 37 different mask models from 28 manufacturers, with prices ranging from just 0.58 yuan to as high as 199 yuan per unit.
The key factor tested was "filter efficiency," which measures how effectively a mask removes particulate matter under controlled conditions. While replaceable filter masks do have some filtering ability, their effectiveness is often limited due to smaller filter areas and increased breathing resistance. This can lead to air bypassing the filter, reducing overall protection. Additionally, these masks tend to be more expensive than their disposable counterparts.
The market for masks is also confusing, with many products claiming to protect against PM2.5, dust, or other harmful particles without clear standards. The Shanghai Municipal Quality Supervision Bureau recently tested 38 batches of masks labeled as "PM2.5 protection" or "dust-proof." Out of these, 24 had filtration efficiency below the national standard of 90%, and 21 did not even list the filter grade on their packaging. Six samples lacked any implementation standards entirely.
One particularly concerning case involved the Yixin SC600C dust mask, which showed zero filtration efficiency in testing. Another brand, "CM Chaomei," was found to have poor dust protection and high breathing resistance, leading to its classification as a "forfeiture product."
A well-known environmental volunteer once investigated a "North Korea" mask, which claimed to be an N95 respirator but was made of bamboo fiber. Testing revealed that it offered little to no protection against PM2.5 and could even cause secondary pollution. Despite this, the mask sold thousands of units online, raising serious concerns about product transparency and consumer safety.
When choosing a mask, consider the following tips:
1. Wear masks when particulate levels reach polluted levels. Disposable masks are generally more effective for smog protection. Replace your mask if you feel discomfort or notice an odor.
2. Choose masks based on individual needs. People with respiratory issues or the elderly should avoid high-resistance masks. Opt for those with exhalation valves. For children, ensure the mask fits properly and doesn’t restrict breathing.
3. Clean and disinfect masks regularly. If wearing one during exercise, choose a model with lower resistance to allow proper airflow and reduce moisture buildup.
As the demand for protective masks continues to rise, it's crucial for consumers to stay informed and make smart choices based on real performance, not just marketing claims.
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