The greenhouse multi-cover kit combines a polyethylene greenhouse that traps heat with a micro mesh insect layer in a single cover. Each layer is zipped separately, with wide openings for easy access and maintenance of your crops. The frame is made from a durable, powder-coated steel, while the polyethylene greenhouse cover helps warm your plants in colder months, extending your growing season. Finally, the micro mesh layer within prevents insects from landing on and damaging your plants, while still letting them breathe freely.Compatible with the small or medium Classic VegTrugSimple, single kit provides the essentials for your growingGreenhouse layer warms your plants in cold monthsMicro mesh layer protects from insects and pests