Cosplay wasn't included in this event. But the group of Luxembourgish Cosplayers also joined this event. It was the first time to see the Cosplayers in Luxembourg.
The jūnihitoe (十二単衣) is an extremely elegant and highly complex kimono that was only worn by court-ladies in Japan. Literally translated, it means "twelve-layer robe".
The jūnihitoe started to appear around the 10th century during the Heian Era. The various layers are silk garments.
The total weight could add up to 20 kilograms.
This explantion was copied from Wikipedia.