Probably the best all year cover you can get and a huge step up from the older stormex, the stormex-pro does it all. Unlike the older cover there are no clear windows that become brittle and no external taped seams which become unstuck over time so a huge improvement. It has a silky soft liner stitched inside to protect your paintwork double underbelly straps chain holes and a vent system to hold open the vents. It's heavy and well made cover, Its not cheap but then quality never is. Sizing- i bought a medium to cover a Honda cbr1000rr-r sp and it was huge on the bike so SBS swapped it out with no problems for a small and it fits perfectly for me as I dont like covers draping all over the floor and flapping in the wind 10/10 for the cover and 10/10 for the service from sportsbikeshop. Added pics to show a small on a RR-R Fireblade