What do you call a bed you make on the floor? How do you do it?

The bed you build on the floor is called a tatami mat.

Craftsmanship

Traditional craftsmanship

Traditionally, tatami mats were made of woven rushes and bundled with straw, and foam was also used. Tatami mats were standardized in shape and size and were piped with brocade or black fabric. In the days when most Japanese lived in houses built on land, tatami mats were a luxury item for the affluent, as some materials had to be imported. Moreover, traditional tatami mats were plain tatami mats with no surface decoration.

Modern technology

Modern tatami mats are made using advanced Japanese technology and equipment, using high-quality straw as raw material, and then fumigated and sterilized at high temperatures, then pressed into semi-finished products, then manually mended and covered with natural straw mats, and then wrapped with decorative bands on both sides to make finished products. A good quality tatami mat weighs about 30 kilograms, just made tatami mats are grass green, after a long time of use, due to oxidation occurs in the sun, will become a bamboo yellow, but also very beautiful. Tatami mats are constructed in three layers, with insect-resistant paper at the bottom, straw mats in the middle, rushes on the top layer, and sealed cloth edges on both sides, which are usually covered with traditional Japanese patterns. The standard thickness of a tatami mat is 3.3 centimeters and 5.5 centimeters.