Men's obi is narrower than a woman's and tied in a simple knot in contrast. It is not normally worn anymore since in is not a formal kimono. Yukata - One of the casual kimonos and the most popular. It can be worn at night as house wear. Sometimes it is worn with geta sandals to a festival or to a temple in the summer.
Women often wear the yukata to festivals.
A type of yukata can be seen and worn as sleepwear in Japanese hotels. Haori - A formal kimono that can be worn with a haori jacket as well as the hakama. It is held closed with a braided cord tied in a decorative knot. Not very popular due to high formality and cost. Hakama - Most famous formal kimono.