This is the same awesome merino wool as "Cadet Grey," just in a straight-up medium grey. We used side tabs rather than belt loops. It makes for a rad dress pant.
I used to get all my bespoke pants (before I started buying EP) with a side tab and have one special edition plaid from EPO with the side tab...it kicks ass, and is quality hardware. Also makes matching shoes a cinch, no belt to think about. Awesome feature!