I'm not sure what they are called but they are a dust mop that we rent from the local janitorial supply place. They have gotten really expensive lately (rent that is) So I'm looking to buy some
They are red, oblong, with strings on the edges to catch the dust.

If anyone knows what these are called or where to buy them. Please let me know

I called the supply place and he said they were just called "dust mops"