comfortable pants if you’re a fan of adidas you can dress up in

I was super excited to see these pants. I had visions of these with a white shirt and a blazer for work (I work in a hospital so I like to be comfortable and put together). These went on great : fitted in the waist with a well-cut, loose arc in the leg. Unfortunately: the fabric is a fail. they stretched out during the first wear - and by the second wear, I had to wear a belt to keep them up and I felt like I had a weird pair of MC hammer pants on. (Age 55, 5’1, 127 pounds, bought a size 4 , and the way they stretched out, could have bought a 0… and I have never been a 0)