Keeps All Light In: VIVOSUN Hydroponic Mylar Grow Tent blocks all light from escaping and is lined with 98%-reflective Mylar to boost the output efficiency of your setup; No need for additional flaps or tape, just zipper the black lining to create a light-proof seal Extra-thick, Stands Sturdy: Supported with strong metal poles, the top-quality 340 g. Oxford fabric tent is tear-proof and double-stitched for perfect light blockage, while the inside is lined with non-toxic PE material that’s safer for your plants Easy Observation: Don't throw out your back bending over to check on your plants; Our easy-access door unzips smoothly, and the observation window makes it easy to peek inside without disturbing your set-up Fast Installation: Our grow tents are easy to install even if you've never done anything like it before: no tools needed; Unrivaled craftsmanship and materials make VIVOSUN's Hydroponic Mylar Grow Tent the best choice for professional and amateur growers alike Quality Assurance: We pride ourselves on delivering the best selection of grow tents at various sizes and affordable prices; We also pride ourselves on outstanding customer care. If you have any issues with your purchase; please do not hesitate to contact our customer service