The 20piece Protection Grass Mat set is designed to suppress weeds around trees, allowing them to thrive by receiving vital nutrients and moisture without competition from vegetation. Material construction: Constructed with robust and weatherresistant materials, these mulch rings are built to withstand various outdoor conditions, delivering durability for your trees' longterm health. Improved moisture retention: These mulch mats help maintain soil moisture by reducing evaporation, encouraging healthier tree growth while minimizing the frequency of watering. Quick installation: Lightweight design allows for easy placement around trees without any special tools or equipment required, making it simple to enhance your garden's appearance and health. Use around newly planted trees to suppress weeds, conserve moisture, and support establishment during the critical early growth period. Use around trees in lawns or garden beds to reduce maintenance, lower watering needs, and improve soil moisture around the root zone. Use in landscape projects around ornamental or fruit trees to enhance weed control, conserve moisture, and simplify ongoing tree care with minimal effort.