I always ride with gloves, boots, armored pants, and a hi-viz Airglide jacket by Olympia, and my hi-viz yellow helmet by Scorpion.
I have gone over on a slow speed uphill u-turn before, and just went down on my hands and knees. But they were protected by my gloves and padded knees. I have no idea what it's like to go down at any speed, but want to know that I have as much protection as possible if I do.
I wear the jacket and pants even on hot days. Better to sweat than to suffer road rash, in my opinion!