Tatami (Japanese armour) the other related parts of a full suit of Japanese armour. Collapsible head protection such as "" and other collapsible armor are also "tatami" armor; a traditional kabuto could also be part of a tatami gusoku. Tatami armour was lightweight, portable, convenient for transportation, and they were manufactured inexpensively for the ashigaru light infantry. Tatami armours were worn by all samurai classes from the highest class to the lowest class. The higher class samurai wore elaborate armour while the lower class samurai and retainers wore simpler versions. In his book "Arms and Armor of the Samurai: The History of Weaponry
Lamellar armour of metal, leather "cuir bouilli", horn, stone, bone or more exotic substances. Metal lamellae may be lacquered to resist corrosion or for decoration. Unlike scale armour, which it resembles, lamellar armour is not attached to a cloth or leather backing (although it is typically worn over a padded undergarment). In Asia, lamellar armor eventually overtook scale armour in popularity as lamellar restricted the user's movements much less than scale armour. Lamellar armour was often worn as augmentation to existing armour, such as over a mail hauberk. The lamellar cuirass was especially popular with the Rus, as well as Mongols, Turks,