Summerweight Garden Fabric 12' x 20' BENEFITS- Fabric protects your plants from insect pests, cold temperatures and too much sun, thicker and more durable than other lightweight fabrics, yet doesn't cause overheating. deal for summertime pest control, this garden cover effectively screens out Japanese beetles, potato beetles, cabbage worms, leaf miners, carrot flies and most vine borers. MATERIALS-Featherweight polypropylene COLD/HEAT- transmits 85% of the light to your plants without allowing heat build-up, while providing cold protection down to 28 degrees F GARDENER'S SUPPLY COMPANY