Ground Guards are an economical way to help keep your boatyard clean and to help protect waterways from harmful, contaminated run-off. Two sizes to choose from depending on the size of your boat. The geotextile is made from a high-quality polypropylene which will not rip or tear. Ground Guards will catch paint chips and oils that run off boats during power washing or just general maintenance or painting. Ground Guards will act as a filter for contaminants.