Not sure but I grabbed a few of the cotton cashmere sweaters awhile back and they're really thin, kinda awkward to wear over a button up. Also, having tried nearly every casual shirt, I think the Oxfords are the best. The material feels sturdy and the they're cut very well.
Yeah, I got the natural linen sweater, and it's very thin, but it makes sense for the summer, I guess. I like that one a lot, hoping the blue doesn't look too odd.
Agreed on the oxfords....I'm a big fan of their printed chambray-ish shirts as well.