Light Proof: Coolgrows grow tent blocks all light from escaping. On the interior, a 95%-reflective mylar lining gives an efficiency boost to lighting setups of any power configuration. Increase the intensity of your grow lights and retain heat to keep your grow room at the right temperature for your plants, flowers, fruits, and vegetables to thrive. High Quality & PVC Free: Coolgrows indoor growing tent with heavy-duty zippers and double stitching for light protection ensure durability and long-lasting use. And we use peva environmentally friendly materials, which is PVC free. 600D Thick tent material reinforced by the metal poles ensures security and stability. Easy Assembly: Includes an instruction for easy set up. This is a great hydroponics growing light kit system starter, whether you want to set up your indoor garden in an apartment, condominium, greenhouse, or any rented space. Easily Observed: The observation window makes it easy and comfortable to take a peek inside.