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 I believe they are Scythian 
 That sounds very plausible.
'From the 7th to the 3rd century BC, the Scythian people of the Pontic Steppes produced and adopted a wide arrangement of clothing. The clothing of the Scythians was formulated in response to the nomadic, highly mobile lifestyle of the early Scythian era and the sedentary lifestyle of later Scythian kingdoms. Much of what is known about Scythian attire comes from the remains of clothing found in Scythian burial sites.'