Seconded. I am absolutely sure I would die in a leather jacket in a 25+C temperature. Or in a denim jacket at 30C temps. Like, literally. It's been 32C today where I am and I'm feeling like someone's choking me even in just a linen t-shirt. It is simply impossible for me to wear a leather jacket at anything over 23C (77-ish F). I'll start feeling uncomfortable if I'm exerting myself to any extent even at like 20C. I seriously don't understand how you can do that, @navetsea . That's not a difference of a few degrees, that's a drastic difference (species have been known to go extinct because of a much tinier change in climate). Turtleneck and a lined leather jacket at 26C... Man.