Retards weed growth with a barrier between mulch and soil. Allows water, air, herbicides, fertilizer and insecticide to flow into the soil. Lends insulation to root systems against sudden temperature changes. Minimizes erosion and loss of mulch due to soil intrusion and is chemically inert, resists mildew, rotting and insect invasion. Reduces plant bed maintenance, maintains moisture and cuts the need for watering. It comes with some degree of UV protection however this product is designed to be installed with mulch or rock covering.