We all hate it, riding in the heat. When it's over 90 outside, I start getting blasting headaches in the summer from being overheated. What measures do you guys take to prevent the onset of heat exhaustion and hyponatremia?? I've tried everything, some helps like having electrolyte supplements in CamelBak, but that doesn't prevent the heat from shutting down my body. I spent $75 this year on Leatt cooling vest, but it didn't do a thing to help. In fact after riding 30 mins with it, I felt cooler when I removed the vest. Luckily riding/racing season is coming up in the fall. Any ideas for next summer??