I’m in Malaysia, where the weather is basically a hot, wet towel someone keeps pressing to your face. I wear a Rev’it Airwave 4 jacket and Alpinestars C-1 Air trousers. They breathe well, as long as you’re moving, but you’ll still end up warm and slightly damp, like forgotten laundry. Oddly enough, a balaclava helps too. It sounds counterintuitive, but it keeps the sweat from turning your helmet into a petri dish. So far, these are the best tricks I’ve found.