DAK Bags Shell Cover?

Interesting bags which are new to me, I believe it is a dust cover for artillery shells. The material is one of the typical DAK or tropical materials except the heavy canvas bottom which is an odd blue-green color. The drawstring ties at the top are made from the same webbing you find in tunics and trousers. These are unissued, and unused but they have some wear from storage. All are dated 1941. Price is for one.