NO LIGHT INTO OUTSIDE - The SunStream Grow Tent blocks light from leaking out and is lined with 98% reflective Mylar to increase the production efficiency of any breeding tent building. EXTRA THICK FABRIC STURDY: The high quality 600D fabric is tear-resistant and double stitched to prevent any light leakage. The fabric is supported by sturdy metal poles, which have been specially developed for a smooth construction. With attention to detail: nothing is more annoying than an inferior zip. That's why we made great efforts to ensure our sturdy metal zip is first class. Easy to observe plants: do not dig your back while watching your plants. Our easy access door opens smoothly and the observation window makes it easy to see in. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.