yukata
An unlined cotton summer kimono worn by both men and women.
When made of lightweight cotton, the unlined and partially lined kimono become yukata. Yukata, however, do not have flutter sleeves, as they are considered too dressy for this informal kimono.
Where it comes from
From Japanese 浴衣(ゆかた) (yukata), originally short for 湯帷子(ゆかたびら) (yukatabira, “kimono worn during or after bathing”).
Adapted from the Wiktionary entry yukata (CC BY-SA 4.0).