To add to Kevin's comment: Rukka has available a back protector which can be purchased separately, made of this new material, which meets CE EN1621-2, the important numeral being the last "2" indicating it's passed the back protector test...almost all back protectors we can buy will say "CE Approved" but only meet the 1621-1 standard, which is not applicable to back protection.
The company also has another back protector, made of their patented flexible honeycomb material which allows (lots) of air flow. It's called the Airpower Outlast Back Protector. Don't know if the U. S. distributor carries it. You put it on, like other high end back protectors, rather than having it already in a pocket in the jacket. The main advantage I see is being a lot cooler than others.
I've got a several year old Rukka suit with the flexible armor. All I can report is that it is cooler than solid armor; I haven't had time to test it by hitting the pavement. If the SRO suit mentioned by Kevin becomes available in a mesh for hot weather riding, I'll happily plunk down the $2,500 for it. That's what, 15 seconds in an EMS helicopter?
Armor is an interesting, complex, and controversial subject. While I've been lucky enough to avoid crashing and testing my Rukka stuff, I did crash a track bike at pretty low speed, somersaulting over the handlebars (stupid mistake, long story), wearing a very expensive set of racing leathers. No bone or joint injuries, but more than two years later I'm still sorry I had that suit on. The CE-approved armor had hard edges which dug into the soft tissue above my knee joints, turned both legs completely purple from hip to heel, and even today the areas that got direct hits from the hard edges are tender and sore. I know, could'a been a lot worse, but the point I'm trying to make is "CE Approved" doesn't mean the armor itself won't hurt you as it protects you. That's why I like the Rukka Airpower system, flexible but meets the same standard. No hard edges.