QUALITY MATERIAL & STURDY STRUCTURE--The 600D oxford cloth of this grow tent is tear proof and double stitched for perfect light blocking; High quality grow tents material reinforced by thick stainless steel poles which hold up to 120lbs.Strong stainless steel poles and solid PC corner connectors that will uphold your grow tent's frame and lock your sturdy structure in place. OBSERVATION WINDOW & MULTIPLE VENTS --Grow tens comes with observation window and multiple circular double -sleeved vent holes.Our easy-access door unzips smoothly, and the observation window makes it easy to peek grow tent inside without disturbing your plant.These holes make it easy to install cables, fans and plant lights in the grow tent.This grow tent vent port-built-in mesh screen and cloth to shield light. TOOL-FREE INSTALLATION--The grow tents can be very easy to install even if it is your first time and just yourself.This grow tents come with extra-thick canvas, heavy-duty zipper and double stitch guarantee the grow tent blocks all light from escaping. On the interior, a 100%-reflective mylar lining makes your lighting set up more efficient at any power configuration.