Provide shade and protection from insects. The Net Grow Tunnel provides both shading from strong sunlight and protection from insects, birds, and other pests. A drawstring allows you to control ventilation in the tunnel by closing or opening the ends. Support hoops are made from galvanized steel, protected against rust. Net Grow Tunnel is 50cm x 40cm x 310cm (20" x 15" x 10'2"). Providing shade with the Net Grow Tunnel can be very useful for hardening off seedlings in the spring. It can also be used for postponing bolting in many salad greens such as lettuce, spinach, and mustard greens.