The easy way to clear gutters without having to climb a ladder! Simply throw a bag onto the roof or gutter. The first rain will activate the biological agents dissolving debris & moss after a few days. The gutter clear bags are safe for wildlife & can be used with rain water tanks. They contain clay food substitute enzymes & the water soluble bags are made from potato starch. Use 2 Bags for 10m gutters; apply twice a year. 4 per pack