The criteria for judging the quality of mask elastic bands mainly include the following aspects

 1. Elasticity: A good mask elastic band should have good elasticity, be able to be stretched to a certain length and not easy to break.  Generally speaking, the tension of a good elastic band should be at least 1.8 to 2.8 times the original length.

 2. Durability: A high-quality mask elastic band should have a long service life and not easily lose elasticity.  Poor elastic bands may become loose after being used for a period of time, affecting the wearing effect of the mask.

 3. Shrinkage: After soaking the mask elastic band in hot water for a period of time, observe the change in its length.  The quality is usually better if the length is shortened within 8%.

 4. Comfort: A good mask elastic band should fit the skin tightly and not cause excessive pressure or discomfort to the wearer.  Some masks use seersucker ear straps, which are closer to the skin and less strangling than traditional ear straps and elastic bands.

 5. Material: Common mask elastic band materials include nylon elastic silk, etc.  High-quality materials usually have better elasticity and durability.  At the same time, it is also necessary to pay attention to the safety of materials and ensure compliance with relevant environmental protection standards.

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