We have LOTS of pollen around here and the socks work great to keep that from going through to the filter.

In order to avoid making them too much work, I have 2 sets. I replace the dirty socks with clean ones every morning, then rinse the dirty ones in a bucket and let them air dry. Perfect for the next morning.

The only problem with using them is that when you see how much junk they pick up, you'll never want to stop using them.