Rubberific Tree Rings give your tree beds a well-maintained look 365 days a year. These 100 recycled rubber tree rings help to prevent erosion compaction and fungal growth while conserving moisture. With a weed fabric on the bottom side say goodbye to weeding around your trees for years to come.Features. Eliminate yearly re-mulching. Stop weed growth that robs trees of nutrients and moisture. Prevent erosion compaction and fungal growth. Conserve moisture. Mow right over it. No more scattered mulch.. Size – 36 in.. Color – Brown.