Fantastic cover with some well thought out features. Having owned an Oxford stormex cover it manged just over a year till it leaked and the seams became unstuck, the cover was maintained with tent proofing spray. The JDC cover was purchased for an MT10 Even though I went large from the bikes measurements, medium would probably fit the standard model fine, if you've a screen and panniers large would be perfect as it has a bit more width and length. The cover is light in weight but extremely strong, the draw cord adjustment makes putting it on really easy, just pull tight to take up the slack and tuck away the excess cord. Wing mirror vents can be closed or opened and a belly strap pulls tight for extra security. Lock holes front and back too. How does it perform? Heavy rain and wind no problem, not a drip anywhere. Soft liner does not scratch paint or screens on a clean bike. Condensation happens with any cover but this seems pretty good at it doesn't last long when the air temperature gets up. Large covers the whole bike down to the floor, the heat proof side panels do there job. For the price it's very impressive and the quality of workmanship looks top notch.