I looked for a simple pair of black pants that could be dressed up or down for ages. When I came across these H&M Slim-Fit Treggings ($15) a few years ago, I finally hit the jackpot. These stretchy, comfortable pants include an elasticized waistband for a perfect fit. There's a mock front so you never have to worry about your fly being down.
Because these pants are so affordable, I buy a few pairs every year. They look great with blouses and heels, but equally as stylish with a t-shirt and sneakers. I love that they feel like leggings, so I can easily wear them all day long. The fabric is also a great quality that makes this design look high quality.
If you're in the market for a new pair of pants, give this option a try. Trust me, it's a purchase you can feel good about.