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
Body worn video (police equipment) have been conflicting studies on the use of body-worn cameras and the effect that these cameras have on police behavior. Early reports touting the benefits of police body cameras were based on limited research of small groups of police officers in a short period of time. In recent years, more robust research has become available, refuting the early claims. Reports on 54 Rialto police officers wearing cameras showed that complaints against officers from citizens dropped by 88% and "use of force" dropped by 59%. Another report that studied the effects of body-worn cameras for 46 officers of the Orlando Police