I wear these over my paper thin SS Polo RLX Golf Shirts (they have a rare 'stand up' collar that works great with Blazers and this Shacket). But they are so thin. Here in Dallas from Mid-May to Mid-October every restaurant, shop, and Mall has the Air Conditioner Blasting away at around 63 degrees! This Linen cover up is just the ticket dressy but not Sport coat dressy. Soft, open weave super breathable fabric, protects from the A/C and then the Sun blasting down in the Parking Lot. Very comfortable. Just right for me (did I mention big pockets for iphones and reading glasses?). Try one. I have liked all my dealings with Todd Snyder. WH