M04 was originally taken in use before other gear of M05 family and is officially called M04 although pattern has the same basic features and looks as other M05 family patterns. The first M04 items were taken in use around 2003 by Finnish contingent of UN peacekeeping mission in Eritrea as a test pattern called K2004. K2004 garments were printed into heavier cloth than current M04 that is printed to Ripstop cloth. Currently the pattern is used by FDF international forces in Afghanistan. It was also used UN operations in Chad, Central African Republc and Lebanon. Also, Finnish officers serving in arid climates as UN Military Observers use the M04 pattern equipment.