I had a three patch made from that blue window pane. I was afraid it might be a bit loud, since it's actually triple window pane, but I feel comfortable in it now. The guys at TT told me they thought it was Loro Piana. They burned some of it with a match and concluded it was a linen/silk blend. They kind of cracked me up. When I asked them for the mill for various cloths they seemed to just be throwing out names without really knowing. BTW, this material is so loosely woven that you have to be careful with the lining. I got it self lined in front. But the white lining in the sleeves actually shows through and makes the cloth look shiny, which it's not. But my tailor said dark sleeve lining would make the sleeves look darker than the body. I'll try to post a photo.