Komon is a kind of kimono with dyed design all over. Some are pattern dyed, some are hand-drawn.
It is informal and daily use kimono, yet you can arrange it to semi-formal style with high class Obi or depends on the design of the kimono itself. It is like a fashionable dress - not good to attend a solemn ceremony, but good to go to a party or to meet friends, or maybe to see traditional art performance. Kimono-lovers in Japan often put on Komon kimono for fun.