From Seamwork:
The Dexter pants might look like a sleek pair of fitted trousers at first glance. But don't be fooled by their tailored appearance, these pants are actually knit. A fitted cut, darts, pintucks, a side zipper, and waist facing give these pants an elevated edge.
Sew Dexter in medium to heavy weight knits such as Ponte or double knits for a classic structured look or try French terry for something with a softer drape.