I'm fortunate to have a job where I can dress however I want, and work from home 99% of the time, so I guess that helps. The last time I had a job where I had to wear "business casual" was ten years ago, and it was miserable, in that regard.
I think heavyweight tees like Flat Head THC are perfect for places like California with a nice climate, but here in the sticky southeast US, I've found that heavy duty tees almost never feel comfortable to wear. It's funny to think back to summer 2013 when I was working at TFH and wearing thick tees every day in the warehouse, it wasn't too comfortable, hah. I like wearing a lightweight tee with an unbuttoned short sleeve (often from TFH!) on top. If I get hot, it's easy to remove a layer and cool down.
Perhaps the real reason Ben has returned is that he was unhappy I was in the lead for the prestigious title of "most posts in the TFH thread"?