Cyc, they're the Schneider navy babylon. Fit maybe half a size big, nice details and taper. Available in navy and black, and wool/linen at Suspension Point, hmm. The wool/poly/cash is nice and thick. They've used it in seasons past.
Guys, don't sleep on the Schneider blue kilim shirt. The blue stripes aren't nearly as bright in person and the shirt material is freaking amazing. Thick and super soft, even more than this one (I think) from a year or two ago.