From Ralph Lauren's Polo Golf Collection's:

A recent Fall release in medium Gray. This a smooth combo of 60% Modal and 40% Tencel, with Polyester lining. A rich looking cognac embroidered zipper on the pockets and center. NWOT, MSRP is $195. Make it yours for much less, more than 50% off! AND, as added bonus, enjoy a Polo Ralph Lauren (Bel Air Golf collection) button down! It is a classic fit in a cream color, size medium, and features a subtle mini herringbone pattern (pre-owned). 

Measurements:

Chest: 21"
Length: 31"
Shoulders: 17.5"