They were used in world cup skiing for the first time this year. Possibly prevented a few spinals too. Well, several people had 80mph crashes and didn't suffer spinal injury anyway. Too early to tell if they are effective.
A version of has been used in MotoGP for a while too, with considerable success.
Both Dainese and Alpinestars have patents and are planning / have released street versions.
@Stonehedge started
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They were used in world cup skiing for the first time this year. Possibly prevented a few spinals too. Well, several people had 80mph crashes and didn't suffer spinal injury anyway. Too early to tell if they are effective.