These are Jewish girls from the Fighting Youth Union (ZWM) in Dzierzoniow. The photo was taken in 1946.
I was in Dzierzoniow in 1946-1947. I found myself in the center of things. There were so many kibbutzim, various ones, of various hues! And I had come as a leftist, from the Soviet Union. So I ask them, ‘Which organization am I supposed to join?’ ‘The ZWM!’ they tell me. Alright, let it be the ZWM.