Just arrived today so this is just a brief note on it, currently on sale from J & S at £39.99 actually bought from their ebay shop with free postage, link to main website for description https://www.jsaccessories.co.uk/buy/frank-thomas-jl02-tailbag/38500.htm it is bigger than i expected and it does expand it is about the same size as a small to medium topbox big enough to fit a helmet in, it has some attached straps in a zipped pocket so it can be used as a backpack, it comes with bungees to attach to luggage hooks and also a velcro strap, comes with a seperate shoulder strap, and a elasticated rain cover that fits over it, has 2 side pockets and a top carry handle, so far very impressed with the quality and construction and it's versatility of carrying options, i bought this mainly to use on the CG125, but i can also see me using on my Xena when going shopping instead of using a holdall strapped to the pillion seat, overall a pretty decent buy