Leaf Relief for gutters with zip hangers is more effective than other types of gutter protection at keeping natural debris; such as leaves and twigs, from blocking your gutters. Leaf Relief can drain 29.7" of rainfall an hour-that's more than the highest rainfall ever recorded (Holt, Missouri 1947 at 12") in one hour. Leaf Relief is not only the most effective gutter protection system on the market, it is also the most invisible. Leaf Relief® lays flatand fits snugly on top of your gutter. Leaf Relief's 25 Year Warranty is your peace of mind that it will keep gutters from overflowing due to internal gutter clogging.