I have for sale my Alpinestars Bionic Air back protector which i wore inside my GP Plus jacket but its designed to fit in all Alpinestars jackets that have the zip in pocket. Its very comfortable as it not only lets your back breathe but also molds and contours to your back so doesn't feel too bulky like many others Ive tried. The only reason I'm selling it is because Ive recently purchased some Dainese textiles and have a dainese back protector for that, My old Astars race suit only has the pop studs so i can use this more modern one. It is pretty much as new, I didn't do much riding last year as i mainly did track days, since then i bought a Multi hence the new textiles so this has gone unused. Its very clean and has no marks or impacts. For forum members im happy with £35 if collected or £40 inc P&P within the UK. Will be sent by courier Full technical blurb below, any questions please just ask. Alpinestars Bionic Air Back Protector Insert The Bionic Air Back Protector insert is CE certified to the latest back protector standard and offers the street rider superior levels of comfort and performance in an ergonomic design. Make your riding jacket's CE armor setup complete. CE Certified Level 1 to the LATEST back protector standard (prEN1621-2:2010) allowing a slimmer, more ergonomic design Slips in to your jacket’s back protector pocket to give you high levels of protection on the street without hindering riding comfort Innovative Dual Density Honeycomb Technology (DDH) combines two different honeycomb structures to offer lightweight impact protection with exceptional breathability and comfort Outer Honeycomb plate - Made of Polypropylene; provides an outer structure to protect the back from penetrating injuries, as well as dissipating impact force over a wider area Inner Honeycomb foam - Made from a special elastomeric compound, this light and flexible impact foam absorbs transferred energy