Adsum Site Pant, size medium.
These are a khaki color, I included a model shot in a different color to show fit.
In great pre-owned condition, lightly worn.
Lying flat and unstretched I measured the waist at about 15.5" across. Approx. 32" inseam. The leg opening (lying flat) is about 8" across.

"A four-way stretch technical zip pocket pant. Featuring vislon pocket zippers, elasticated waistband with drawcord and back pocket drainage holes.