Once you've had road rash, you'll likely change to wearing jeans, and maybe even more on your legs, as well as boots and the rest of the gear. Having "been there, done that", I can tell you that it's NO fun!! I was just taking off from a stop light, and couldn't have been doing more than 20-30mph, but only spent the weekend in the hospital with nurses picking gravel out of my palms, and knee, and I NEVER want to do that again!!! As soon as I got out of the hospital, it was off to the leather store to get some chaps to go with my leather jacket and new gloves. I also ALWAYS wear steel-toed boots when I ride. I don't care how hot it is, I'm protecting my feet and ankles, because if I had NOT had that steel in the toes of my boots when I had my wreck, I'd have probably lost half my big toe, or more! Instead, I have a dime sized chewed up spot of steel showing through the leather on those boots. I'm also considering getting some armor to go underneath
all my gear.
The more you ride in the heat in all your gear, the more your body will adjust, and you won't even notice it after a while.
BTW, my son had a wreck on his bike only a couple weeks ago, and is STILL recovering! He had put on his chaps just before we took off, and we were probably about an hour into a 3-4 hour ride, but had slowed down to about 20-30mph in a tiny 'berg in the middle of nowhere when a couple of dogs ran out into the street in front of the Jeep pulling a trailer in front of him. They slammed on their brakes, and he slammed on his, skidded for about 20-30 feet, and then lost control. Bike ended up almost upside down on top of him on the right side. Because he was wearing his gear, ALL of it, including new steel-toed shoes, he didn't have ANY road rash. The EMTs were actually nice enough to keep his 'colors' in tact, and got his chaps off without cutting, but still cut his jacket and shirt off. His right glove was missing the little finger, and the next was about halfway torn off, but NO marks on his hands. His full face helmet had some scrapes on the right side, too, and his right shoe was chewed up on the outside a bit, but still wearable. He still ended up with 3 broken ribs, and a collar bone broke in 3 pieces, which was a spiral fracture. The orthopedic surgeon who fixed the collar bone said the procedure normally takes 45 minutes total, but it took him 45 minutes JUST to put the bone back together and in the right place. Then, he used the biggest metal plate he had, and STILL wished it had "another hole". 6 screws, and an hour and a half later, and he's all back together, but the ribs are STILL healing, and causing him pain, and probably will for a couple of months
I say all this simply as a warning and a caution to everyone. Wear the gear, no matter how hot it is. You're better of having it and not needing it, than needing it and not having it. As I said before, your body has a wonderful way of adjusting, and you'll soon not even notice the heat, except possibly for your breathing. I still have trouble breathing in the extreme heat, like I'm not getting enough oxygen. If heat is still a problem for you in the gear you have, get better gear that breathes, but still has the armor in it.
Some will still say they don't need it, but when they're lying on the side of the road, with body parts all chewed up, screaming out in pain, they'll WISH they had listened to me.