Yesterday's scorcher heralded the long awaited coming of summer (to me anyway). And getting a mild heat exhaustion on the ride home yesterday prompted the questions: What did I do wrong? How do I prevent that from ever happening again? Good news for me, a quick googling solved all the mysteries. This article answers all my questions:- http://www.soundrider.com/archive/safety-skills/when_youre_hot.htm Thought I'd share it with you guys, if you haven't already read it / known all that. TLDR: "... insulate your skin from the sun and hot air, use evaporative cooling around your neck, and drink lots of water." And that's what I did wrong - Or rather, what I didn't do. I drank lots of water regularly, but that alone is not enough when ambient temperature is above 37 C. It was 40-ish yesterday and I was in my vented leathers with the helmet visor cracked open. Having gone through the article though, I have a few questions I can't seem to find answers to. With regards to insulating your skin, would wearing a rain suit over my vented leathers do the job? Or do I actually need to wear thick clothings underneath? The article mentions wearing a water-soaked t-shirt inside your jacket, but I don't imagine leather jackets would appreciate being wrapped around a wet t-shirt. Is there any way to get around this without having to buy a new jacket?