This grow tent was made from waterproof polyester fabric, which is reinforced by strong metal poles for stability and strength. Completely Non-toxic - will not react under light and heat, and no off-gassing to harm plants. It has light blocking heavy-duty zippers and double stitching to ensure durability and long-lasting use. With a large zippered door and Velcro front/side windows, you can easily check in on the growth of your plants and regulate airflow in your tent for better seed germination and flowering, extending the plant growing season.