Lightweight sweatpants with flimsy construction

I just received these sweatpants 2 days ago and have worn them twice. I was looking for some light-weight, comfortable sweatpants with pockets, which is what I received. The fabric is soft and the picture provides an accurate representation of the item. The pants seem sized larger than expected (in both measurements), although it's possible they would shrink to the given size in the wash.Sadly, I forgot to include the basics, like quality of build, in my criteria. The first time I wore these sweatpants, the drawstring disconnected from the back of the waistline. After that, I was able to completely remove the drawstring from the waistband. I wish I could say that I unduly stressed the cord, but I was basically just re-positioning the waist.I will not be going with the same item again.