The HydroShield gutter guards are a cost efficient solution for preventing obstruction caused by debris, leaves, and water build up in your gutters. Clogged gutters are a hassle that can be costly and even dangerous. These gutter guards are easy to install and require little to no maintenance. The Flex-Fit option fits directly under your roof's shingles and on top of your existing gutters. For a securer fit, you can opt for the Snap-Fit option that will snap onto your existing gutters.