I replaced the cheap (CE approved) back protector in my new leathers with Quattrotempi. It can be shaved down to fit the pocket if needed, but I just sewed in a larger pocket in the liner to fit this back protector instead. I can't feel it once the suit is on, and because it's pliable, it makes it so much easier to get the suit off. I've crashed in SAS-TEC (the makers of this new green version) before and it was like floating on air as I skidded on asphault. Research shows this also absorbs more joules of energy than standard CE back protectors.