We all know that cashmere makes things warmer and more fragile, silk makes things hotter but stronger, linen makes things cooler but wrinklier, and cotton sucks. I'm sure many of us have heard the common knowledge about these things, but sometimes things are nuanced. Here's a chance to talk about how your various esoteric blends perform (sport coats or suits whatever - presumably more sportcoats), and/or challenge the common knowledge if your experience differs. (obviously the weight of the material is going to have a big impact, don't let that hinder the discussion) Myself: I have two wool/linen blend sportcoats, fully lined, but open weave. The linen and weave do their job - the coats stay nice and cool, but they do wrinkly as you'd expect with linen. It has nice body though. I have a wool/silk jacket that does fine in warm weather despite the silk (fully lined, half canvas), though it is definitely a light weight material. Doesn't wrinkle at all, hangs very nicely. I have completely unlined/unstructured flannel (unusual combination, perhaps) jacked that is on the warm side. Fairly beefy flannel, shapes nicely. Flannal attracts lint though, which is annoying. I have an open weave cashmere 1/4 lined donegal unstructured jacket. Is it possible for something to be neither worsted nor flannel? Cause I think that applies here. You'd think it would be warm, being cashmere, but the open weave makes it very breathable, so it's no problem. Does not wrinkle at all. I have another jacket that's cotton/linen (or maybe I threw it away, idunno), and it's actually fairly warm given the heavy fabric, and wrinkles/bunches a decent amount. Pre SF. My suits are all 100% wool. I do have a pair of pants that's 5% cashmere, 150's, and they basically are softer but also hang very smoothly and nicely. Any interesting / counterintuitive observations from anyone else?