100% Natural Coco Coir Material: Crafted from premium coconut fiber, these eco-friendly mulch rings are fully biodegradable while remaining tough and breathable. They promote strong root development, enhance air circulation in the soil, and gradually decompose to enrich your garden without leaving plastic waste. Effective Weed Control & Root Protection: Designed as a natural weed barrier, these coco coir tree rings help suppress unwanted growth around trunks and stems, reducing competition for nutrients. They also minimize soil erosion, keep soil structure stable, and protect delicate roots from mechanical damage and harsh elements. Superior Moisture Retention & Temperature Insulation: With excellent water-holding capacity, these mulch discs significantly reduce moisture loss through evaporation, allowing you to water less often. They help maintain stable soil temperatures, protecting roots from extreme heat in summer and cold in winter for healthier plants and trees. Easy to Install & Custom Fit for Most Trees: Each mulch ring measures 15.7 inches in diameter and includes a pre-cut center hole that slips easily around tree trunks or plant stems. Indoor & Outdoor Versatility for Neat Landscaping: Perfect for potted plants, trees, and garden beds, these coco coir mats keep soil in place and areas looking tidy. Use them on patios, balconies, nurseries, offices, and landscape borders to keep weeds down, reduce mess from spilled soil, and support long-term plant health. Color: As Shown Material: Coir Package Contents: 4* Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.