Thank you for your review.
We are very sorry to hear that the sweater did not perform as you expected after wearing.
This style is made from 100% cotton yarn. As a natural cotton knitwear item, it has softness and flexibility, and the fabric may relax or loosen when certain areas, such as the sleeves, are pushed up or stretched during wear.
We completely understand how disappointing this must have been, and we truly appreciate you sharing your feedback with us.