Upgrade Design --- UPGRADED CONNECTOR--Durable PA Material Adopted, Anti-rust Reinforced Design, Adjustable Tightness According to The Pole, Hold Poles Tightly for Firmed Support. Multiple vents to accommodate fans and filter; ducting rectangle window with mesh to keep dust and insects out; Removable mylar floor tray easy to clean. Effective Light Proof----Our grow tent with extra-thick Mylar, heavy-duty zipper and double stitch guarantee the tent blocks all light from escaping. On the interior, a 98%-reflective mylar lining makes your lighting set up more efficient at any power configuration. High Performance Growth Rate---- An advanced grow tent designed to create optimal climate conditions for year-round growing indoors. Grow tent increases the intensity of grow lights and retain heat to keep your grow room at the right temperature for your plants, flowers, fruits, and vegetables to thrive. Superior Materials and Sturdy Structure---- The grow tent is made of tear proof 600D canvas and double stitched to ensures the light blocking. Strong metal poles and solid PA corner connectors that will uphold your grow tent's frame and lock your structure securely in place. Ensure stable and heavy duty enough for durable & safety use. Tool-Free Fast Installation--- Our grow tents are easy and fast to install without tools even if you've never done something like this before. The package includes the user-friendly and professional instruction well for easy set up. PLEASE NOTE: The tent is simple design and economicalＴhere is NO observation window. The window at the bottom is helpful for heat dissipation. Rectangle vents with mesh for better ventilation and keep mosquitoes out.