I've tried on the wool/cashmere variety, so I guess that they are the 'winter' type. I've seen Canali unlined summer jackets in wool/linen, but I'm not sure if they were actuallly a 'Kei' jacket. I tried on a solid medium grey..with a tweed-like finish, and it was great. I've also seen a solid dark blue model. I tried on a black'n'white houndstooth Kei which didn't look so good on me. I've also tried a tan Canali jacket, same effect. Basically with my complexion, I need darker tones.