For what it's worth, this was in the Q&A section of the Regent Fit BrooksCool suit:
How are the BrooksCool Suits constructed? Fused, half-canvas, or full canvas? Is there any lining?
1 day ago
by JRATLEDGEHuntsville, AL, USA
Hello, thank you for your inquiry. Our BrooksCool Regent Fit Suit is crafted using full canvas construction. Indeed all of our BrooksCool suits are made as such. This suit is only partially lined, along the back of the shoulders and sleeves.
This just isn't true, unless they've changed the construction in the last 18 months. I'm wearing one right now that I bought in late 2011. I'm actually very fond of it, but let's not call it what it's not.