Hello! First of all, congratulations, the underwear fabric you chose is very soft and comfortable to wear. Secondly, it will deform after a long time, and it will become bigger, longer and thinner. And fragile, not very strong. Because the modal content is too high.

The modal content of ordinary underwear with modal fabric is 40%-50%, and the most common one is the blend of 47% modal +47% cotton +6% spandex. This kind of fabric is also very comfortable.

I suggest you choose underwear with modal content between 40% and 50% in the future and wear it for a relatively long time. But after a long time, for example, more than 2 years, it will still deform, become bigger and thinner. Hehe, be sure to see the ingredient content clearly before buying!