Knox were the first to develop the scaphoid protection system and my Knox winter gloves have it (as do all of their gloves) as standard. Unfortunately mine also have the relatively awful Boa fastening system which is a pain to do up when wearing winter gloves but it does give you a great clam-shell cuff 'gauntlet' with many sliders.
The only thing it doesn't have, which is usually a must for me, is the pinky-linky between the little and ring fingers.
I'm not too sure about the slider at the base of the thumb, the Knox has it as well as at the heel of the hand, but my everyday Alpinestars (with pinky-linky) only have it on the heel of the hand and the outside edge of the little finger.
I know all the videos show the hand being palm down when you land and claim that that is what causes the scaphoid injury, but I'm not sure. I mean, yes it would, of course. If you trip or slip while walking, then for sure you put your hands out in front of you and palm plant as you land. But on a bike, you normally land on your side in a low side with the outside edge of the hand, wrist and forearm contacting the tarmac first. In a high side it is anyone's guess and in a head-on, you have have more serious things to worry about breaking than your scaphoid; like your neck. I've only ever come off at anything above walking speed, off road and definitely landed on the side of my hand so fast you couldn't react to do anything else.
I guess the perfect glove doesn't exist. Yet!
