Leaf Filter is a gutter cover system that uses a screen to filter out leaves, pine needles, and other debris from your gutters. The screen has very fine holes that let water pass through the screen while keeping all other debris out. They claim that things as small as a grain of sand will be kept out of your gutters.
Leaf Filter is a cover only that fits over your existing gutters. This is good if you already have existing gutters in good condition because you can save money on the product and the installation costs. But if you’re gutters need replacing anyway then you should factor the costs of new gutters in and compare prices to a complete gutter system.
Based on some of the information on their website, expect a high pressure sales pitch and a high price to install. If you have firsthand knowledge that this is incorrect then please post a comment.