Ultra-Gutter Guard® keeps sediment and other debris out of curb inlets. It is manufactured from 100% recycled synthetic fibers and designed to filter out silt and other debris from stormwater before it drains into curb inlets. With built-in overflow ports, it allows water to pass through during major rainfall events, to protect against clogging. No installation is required; simply place in front of curb inlet with at least a 12" overlap on each side. It is available in various lengths and is washable and reusable. It helps comply with NPDES, 40 CFR 122.26 (1999) and TMDL, BMP and SWPPP requirements. Made in the USA.