HJC C91N - Plain Black

The helmet fits well. It appears to be well made, and the interior is decently padded. It is stylish and I like the colour scheme. The noise suppression could be better, and the chin strap is a bit awkward to undo, but at the price you can't have everything! Overall, a good buy.

A stiffer shell and generally better build quality than the IS2 design that it replaces, good fit and quieter than my Duccini full face

I've had the i90 and just recently purchased the c91n both great helmets for the money and very comfortable aswell as being able to use klarna makes them even more affordable.
I will say the i91 sun glasses are better and further away from your face than the c91n and the fact that the visor on the c91n acts independently to the flip up can be a bit annoying to me sometimes but all in all great helmets I did also find the i90 to be quieter against wind noise. But these are all minor niggles for me as the helmet is so comfortable.. I'd also advise going a size up from what your head measures as I found the i90 large came up quite tight hence buying the c91n if the i90 had xl in stock I would of bought it again.