It's a simple gadget--they make pool vacuums that work the same way, like the Black Magic. The garden hose creates a pressure spray that blows debris into the collection bag. It's very powerful but fine stuff passes through the bag. But for bigger stuff, it just sucks it up! The leaf-baggers work exactly the same way.

This is all a Black Magic vacuum is. There are other brands, too. The bag clips on the top. I think Biogard makes one, too.


Here's what a typical leaf-bagger looks like:



Pretty similar in concept, but geared for leaves.

Hope this helps.