Klim D3O Viper T5 Pro Back Protector Replacement CE Level 2 D30 Back Pad for Klim Jackets. D3O's Viper back protector benefits from Airwave Technology and is extremely flexible, low profile and lightweight, whilst offering incredible protection. Measures 17 Tall by 11 at widest point.
I was familiar with the d3o material from my Klim gear. So, when I got a Dainese jacket, I wanted more form-fitting protection than the Dainese inserts. As it turns out the Viper T5 Pro has almost exactly the same dimensions as the Dainese N-Frame insert, so it fits in the pocket of the new jacket perfectly. The d3o material conforms to your back, so you're pretty well unaware that it's there. I hope to never "need" it, but am glad that I have it. A real value in back protection.