HaggarMen's Active Slim Fit Flat Front Supreme Flex Waistband Pant

Is the fabric shiny?

I usually wear a 31 in the waist. Should I size up or down?

I would really like these it's just too bad you don't? have men's sizes only little boys.

In the pictures, dark beige looks lighter than medium beige? Is that true or are the pictures or words correct. I want the lighter of the two.