This recycled rubber tree ring will never scatter, even when you run a mower over it. Unlike bark mulch, this mulch ring doesn't acidify the soil and it won't need to be replaced each year. The ring suppresses weeds while letting air and water reach tree roots. They also keep mowers and trimmers away from trunks, preventing damage to bark. Slit allows easy placement around a tree trunk and the center hole can be cut with scissors to fit.