Made of 100% recycled rubber materials, Double L Reversible Tree Rings are attractive, easy to install, and very durable. Pre-cut for easy installation, our tree rings fit many different tree trunk sizes, allowing you to easily cut to your custom size. Double L Reversible Tree Rings maintain soil moisture while allowing the ground to breathe naturally and control weed growth. It even protects trees from possible mower and trimmer damage. Most importantly, Double L Reversible Tree Rings do not crumble or curl like the competition!