For girls, the reasons for eliminating clothes are tens of millions of discolored deformations, outdated styles, and weight fluctuations.
Almost as long as it is a reason for your own approval, you can get out of a dress.
But many people are completely different attitudes towards underwear.
"Not bad~"
"Although it is a little uncomfortable, I can still wear it."
"It took a lot of money to buy, and then wear it for a few more months!"
I don’t know if underwear has a shelf life. 
Xiao Mi knocks on the blackboard!
Research has shown that:
Even in the quality of the underwear, the better use of the state can only be maintained at about 100 times.
If the underwear is changed every day, only two pieces of underwear are replaced in the same period of time, then the underwear is worn 15 times a month, and the service life of the underwear is about 6 months; if it is worn every day, then the service life is also It is about 3 months.
Therefore, considering the replacement frequency, underwear quality, washing and maintenance, etc., the shelf life of an underwear is usually around 3-6 months. But in the "shelf life" underwear, really do not have to consider the elimination problem?
Xiao Mi reminds that if there are several situations, it is still necessary to bear the pain of cutting love. 
Shoulder strap loose
In the entire underwear, the shoulder strap is flexible and responsible for providing most of the lifting. However, if it is improperly adjusted or worn for a long time, the elasticity will gradually decrease and it will be prone to decline.
If your underwear straps are adjusted anyway, it will still fall down. This is the sign of aging underwear, reminding you to replace it.
The bottom is loose
The bottom itself is also flexible, mainly responsible for supporting the chest. But like the shoulder strap, after a long period of wearing and changing, or improper cleaning and maintenance, the bottom will gradually lose its elasticity.
If you buckle to the innermost feel, the bottom is loose, and raising your hand will cause the whole bra to move up, indicating that this underwear should also be laid off!
Steel ring deformation
If the steel ring is exposed, it must be eliminated. There is no need to try the "seam-filled three-year" approach to try to remedy, the effect will be greatly reduced.
In addition, if the underwear rim is found to have obvious discomfort when worn, it is necessary to check whether the rim of the underwear is deformed. If the steel ring shows obvious deformation, this underwear should be quickly eliminated!
If the naked eye can't judge directly, then the bra can be laid on the table top. If the steel ring partially leaves the table, it will be deformed. 
Cup deformation
Generally speaking, if the cup surface of the cup underwear is visible and creased, the cover surface appears loose and loose, and the chest cannot be lifted after being put on, indicating that the cup material has been damaged and deformed.
The primary function of underwear on the chest is to lift the support. If the cup is deformed, the support effect will be greatly reduced!
Fabric aging
In addition to the deformation of the cover, the aging of the underwear fabric is also an important signal to eliminate.
After many times of cleaning the underwear fabric, especially the cup lining, it will age and harden, pilling discoloration, yellowing and mildew. If such underwear continues to wear, it is very bad for the chest skin. 
Ok, today's science is here!
Little fairies, remember to check if your bra is "expired"?
Shandong EMF New Material Technology Co., Ltd , https://www.earthingsilver.com